Sonic.fbx Full Version |top| -

It seems you've entered a search query that could be related to the popular video game character Sonic the Hedgehog and a 3D model file format (FBX) possibly related to a full version of a game or a model. Let's craft a story that brings these elements together:

It was a peculiar day in the bustling city of Station Square, where Sonic the Hedgehog was known to zip through at breakneck speeds, saving the day one loop at a time. But today, Sonic found himself in a situation unlike any he had ever encountered. Dr. Eggman, his arch-nemesis, had somehow managed to trap Sonic within a digital realm.

The digital realm was a vast, intricate world made entirely of code and 3D models. Everything from the ground Sonic stood on to the sky above was crafted from files with extensions like .FBX, .OBJ, and others used in 3D modeling. Dr. Eggman's plan was to keep Sonic trapped here, forcing him to relive the same digital loops for eternity.

Sonic, however, was not one to give up easily. As he sprinted through this digital landscape, he noticed something peculiar. The environment was made of various 3D models, and among them, he spotted a file labeled "sonic.fbx." It seemed to be a full version of his own digital model, captured and trapped just like him.

Determined to escape, Sonic decided to use this to his advantage. He reached out and touched the "sonic.fbx" file, and suddenly, he was transported into the model itself. Inside, he found a digital version of himself, created from the same 3D modeling software that the digital world was made of.

The digital Sonic was confused but also helpful. Together, the real Sonic and his digital counterpart worked out a plan. They knew they had to find a way to export the digital Sonic out of the digital realm and back into the real world.

Their first challenge was navigating through the digital Dr. Eggman's fortress, avoiding traps and enemies along the way. With his speed and agility, Sonic managed to outrun most dangers, while his digital self could phase through certain obstacles, proving to be a valuable ally.

As they progressed, they encountered various 3D model files, each representing different characters and objects from Sonic's world. With each file they interacted with, they learned more about Dr. Eggman's plan and how to counter it.

Finally, they reached the heart of the digital fortress: Dr. Eggman's mainframe. The evil doctor was there, laughing maniacally as he watched Sonic struggle. But Sonic and his digital self were not to be underestimated.

With a burst of speed and a clever hack from his digital counterpart, they managed to access the mainframe's export functions. Sonic's digital self was saved as a new file, this time not trapped but free to be used for good.

The real Sonic then used the digital Sonic's model to lure Dr. Eggman into a trap. The evil doctor, underestimating Sonic, charged at him with one of his robots. Sonic dodged at the last second, and the robot collided with the "sonic.fbx" file now projected on the screen.

The collision caused a chain reaction, crashing the digital realm and freeing Sonic from his digital prison. As the digital world collapsed, Sonic found himself back in Station Square, standing victorious.

Dr. Eggman was once again defeated, and Sonic had saved the day. The "sonic.fbx" file, once a symbol of confinement, had become a key to his freedom. And as for digital Sonic, he became a legendary hero in his own right, a symbol of the power of unity between the digital and physical worlds.

From that day on, Sonic made sure to keep an eye on any .FBX files that crossed his path, knowing that in a world where digital and reality were increasingly intertwined, you never knew when an adventure might begin.

is a psychological horror fan game inspired by Sonic.EYX, featuring the entity Nano who takes on various distorted forms of Sonic. Created by developer AlyisWeaver, the full version was released on Game Jolt around December 2022 and follows the standard ".exe" horror format where classic characters are brutally hunted. Key Features of the Full Version

Compared to the initial demo, the full release includes expanded levels and more aggressive meta-horror elements:

Playable Characters: Beyond the standard Tails level, the full game features levels for Knuckles and Dr. Eggman.

Meta-Horror & Fourth Wall Breaks: The game is notorious for interacting with the player's computer. It may display error messages about failing to access your location, take control of the mouse cursor, or even attempt to shut down the PC.

Nano (Sonic.fbx): The primary antagonist, Nano, is a shapeshifting creature that can manipulate game data, teleport, and project text onto the screen to communicate directly with the player.

New Content: Later updates, such as the Nano.EXE 2 update, added unique death scenes (including one for Mighty) and secret endings. Gameplay Mechanics

The game emphasizes a "slow and steady" approach to avoid triggering the entity:

Stealth over Speed: Running can cause the entity to chase the player, making slow movement a strategic necessity.

Environmental Puzzles: Players must collect crystals to make obstacles disappear and navigate corrupted zones.

Persistent State: The game "remembers" previous sessions, and reopening the application after a crash or scripted close often leads to new dialogue or events. Safety & Development History

Early versions of Sonic.fbx were controversial due to the inclusion of an IP grabber, which led to its temporary removal or warnings on certain platforms. The developer subsequently released updated versions—often labeled as "Fixed"—that removed these harmful elements while retaining the horror atmosphere. SONIC.FBX ENDING (SONIC.EYX INSPIRED HORROR GAME)

(also known as psychological horror fan game inspired by . While it is praised for its atmosphere and visual design, its legacy is heavily marked by controversy regarding its intrusive "fourth wall" mechanics. Core Gameplay & Mechanics

The full version expands on the initial demo by including multiple playable characters and unsettling environmental shifts: Characters:

You start as Tails in the "Lost Forest Zone," but the full version adds levels for Knuckles, Eggman, and Espio. Nano (The Entity):

The primary antagonist, Nano, is a shapeshifting creature that takes on eerie, deformed versions of Sonic to torment the player. Fourth Wall Breaks:

The game frequently interacts with your system, including taking control of your mouse, displaying error messages on your desktop, and accessing your device location. The "Full Version" Controversy

The game's reputation was significantly affected by the developer's use of highly intrusive features in early builds: IP Grabber:

Early versions contained an IP grabber, which sparked a backlash in the community and led to a change in rules for the Luigikid.exe Challenge where it was submitted. PC Shutdowns:

The game was known to forcibly shut down the player's computer if they continued playing past certain warnings. Current Safety:

Updated versions (like V2.0) have reportedly removed the IP grabber and most malicious-acting elements, though they still use intense fourth wall breaks for horror. User Experience & Reception Reviewers on

have highlighted the "amazing" sprite work, particularly the disturbing imagery of Sonic after self-mutilation. Difficulty/Bugs:

Some players have noted that the game can feel glitchy, with issues like music continuing after a game over or characters surviving lethal obstacles. Atmosphere:

It is widely considered one of the more terrifying .EXE fan games due to its relentless taunting and the feeling that "it's always watching you".

is a popular horror fangame inspired by the trend, created by developer AlyisWeaver. The "full version" typically refers to the V2.0 Update

(also known as the "Nano" update), which expanded significantly on the original demo. Gameplay and Story Elements sonic.fbx full version

Unlike traditional Sonic games, Sonic.FBX uses meta-horror elements to blur the line between the game and the player's computer: The Entity

: The game features an "upgraded," HD-looking Sonic entity that taunts the player and can even take control of the player's mouse. Breaking the Fourth Wall

: In early versions, the game gained notoriety for simulating (and sometimes actually executing) a PC shutdown as a consequence for playing. Character Levels

: The full version includes playable segments for characters like , often leading to gruesome death scenes. Location Access

: A recurring psychological horror element involves the game claiming it has "failed to access location" or successfully tracked the player's IP. Controversy and Updates Malware Concerns

: Early versions of the game sparked controversy for allegedly including an IP grabber. The developer eventually addressed this, and the current Full Version/Nano Update available on is considered a "safe" version for streamers and players. Secret Content

: Players have discovered hidden Easter eggs, including a secret flying sequence triggered by pressing the 'E' button at specific moments. Legacy and Remakes

The Sonic.FBX series continues to evolve with newer community projects: SONIC.FBX ENDING (SONIC.EYX INSPIRED HORROR GAME) 10 Dec 2022 —

The " Sonic.FBX Full Version " refers to a horror fan game (an "EXE" game) created by developer AlyisWeaver that is heavily inspired by the "Sonic.EYX" creepypasta style. The Story of Sonic.FBX

In the full version, the story expands beyond the initial "Tails" chapter to include harrowing levels featuring Knuckles and Dr. Eggman.

The Premise: The game presents itself as a corrupted file. Upon launching, players are often met with meta-messages stating that "Sonic FBX has failed to access location," yet the entity within the game persistently attempts to bypass system security anyway.

The Descent: Players begin in the "Lost Forest Zone" as Tails, navigating a world that feels "off"—filled with unsettling atmospheric music and a looming sense of being hunted. Unlike traditional Sonic games, the goal isn't just speed; it's survival against a "scary" and persistent version of Sonic that cannot be outrun.

The Expansion: As a "full release," it introduces new gameplay mechanics and darker narrative paths for Knuckles and Eggman, leading to secret endings that differ from the standard "game over" scenarios typical of the genre.

The Vibe: The game is noted for its "Sonic EYX vibes," utilizing heavy distortion, psychological horror elements, and jump scares to subvert the nostalgia of the original Genesis trilogy.

For fans of the genre, the full experience is often described as a significant step up from the early demos originally submitted to community challenges like the Luigi Kid EXE Challenge. Check out the full walkthrough and secret endings here: 08:19 Sonic.FBX Final Version With Secret Endings Meaningless Awaz YouTube• Dec 9, 2022

How to Use

  1. Import the sonic.fbx into your engine of choice.
  2. Extract Textures (provided as a .zip or embedded in FBX if custom properties are saved).
  3. Assign Materials (drag material assets onto the mesh or use the pre-built material slots).
  4. Set up Animator Controller (Unity) or Animation Blueprint (Unreal) using the included animation clips.
  5. Adjust Rig – If the character is scaling incorrectly, check the "Import Scale" (set to 1.0 for real-world size).

Final Verdict: Is the Full Version Worth It?

Absolutely. If you are serious about animation or game dev, using a stripped-down .obj or a static .stl file will kill the dynamic energy that defines Sonic. The sonic.fbx full version gives you control over every spine flick, every ear twitch, and every fist pump that makes the Blue Blur feel alive.

Remember to always credit SEGA and the original model extractor, and never use these assets for commercial Kickstarters without legal permission. Happy animating—gotta render fast!


Looking for more rigged character models? Check out our library of 3D assets and game-ready rigs.

is a horror-themed Sonic the Hedgehog fan game inspired by Sonic.EYX, known for its unsettling atmosphere and fourth-wall-breaking mechanics. Key Game Features

The Antagonist: The game features Nano, a faceless, high-definition version of Sonic with "God-like" abilities, including teleportation, data manipulation, and the power to take control of the player's mouse.

Gameplay Mechanics: You typically control characters like Tails, who appears weak and unable to fly properly. The "Full Version" and later updates expanded the game to include levels for Knuckles, Mighty, and Eggman. Controversial Elements:

IP Logging: Early versions were controversial for including an IP grabber. While later updates reportedly removed this, the game still attempts to simulate or access the player's location to create a "stalker" effect.

PC Interaction: The game is designed to trigger error messages and can force your PC to shut down if you ignore its warnings to stop playing. Game Evolution & Versions


Conclusion

The Full Version of sonic.fbx provides everything a creator needs: a clean, animator-friendly rig, expressive face shapes, ready-to-use textures, and a solid animation set. It's ideal for fan games, machinima, motion studies, or simply learning character setup.

Remember: Always credit the original model author if redistributing, and respect SEGA’s fan content policies.


is a popular horror game created by AlyisWeaver that is heavily inspired by the creepypasta style. Originally a demo for the Luigikid EXE Challenge , the full version (often referred to as

) expands on the psychological horror and technical "meta" scares that defined the initial release. Core Gameplay & Narrative

The full version follows a series of victims attempting to survive the corruption of Sonic, who has transformed into a god-like entity. Unlike traditional Sonic games, this title focuses on linear, high-tension levels where survival is often impossible. Playable Characters:

Beyond the initial levels as Tails, the full version introduces Espio the Chameleon Mighty the Armadillo Unique Mechanics:

Each character has specific segments, such as Espio using Knuckles' animations to traverse monster-filled environments. The "Piracy" Warning:

A notable meta-segment features a fake "piracy is no joke" screen, demanding the player delete the game before it escalates into fourth-wall-breaking scares. The "Long Report" on Technical Scares The game is notorious for its aggressive fourth-wall breaks and meta-horror elements that simulate a system compromise: PC Interaction: The game is known to shut down your PC

or take control of your mouse cursor during key sequences to heighten the sense of danger. System Messages:

It displays realistic-looking Windows error boxes and messages on your desktop, sometimes even triggering false Windows Defender alerts. File Manipulation:

The game creates or refers to local files to convince the player that "Sonic.FBX" is an actual virus or entity living within their hardware. Latest Developments: Rewrite Prequel As of late 2024, the developer released Sonic.FBX Rewrite

is a horror indie game created by AlyisWeaver , heavily inspired by the well-known

creepypasta. Unlike a standard Sonic game, this "full version" is a meta-horror experience that interacts with your computer's system to create a sense of dread. 1. Getting the Game The official full version of the game is hosted on . You can download it directly from the FBX Game Jolt page

: Be sure to download the "Full Version" or "Part 2 Update" rather than the initial demo to experience the complete story and all endings. 2. Gameplay Mechanics & Hazards System Interaction

: The game is notorious for simulating system failures. It may "fail" to access your location or even shut down your PC if you persist in playing after certain warnings. Mouse Hijacking It seems you've entered a search query that

: During specific sequences, the character (Nano) will take control of your mouse cursor.

: Most of the gameplay involves standard platforming as Tails in the "Lost Forest Zone," though movement is intentionally hindered to increase tension. 3. Characters and Lore Nano (The Entity)

: The primary antagonist who takes the form of a distorted, often faceless Sonic. He is described as a "GOD" classification in some lore wikis, capable of breaking the fourth wall and manipulating game data.

: You primarily control Tails, who appears weak, unable to fly properly, and is eventually subjected to graphic horror elements. 4. Secrets and Easter Eggs The "E" Secret : Pressing the

at specific times can trigger hidden sequences, such as a surprising flying segment. Multiple Endings

: The game features various death scenes and "secrets" that appear based on how long you play and which directions you explore in the forest. 5. Safety Warning

Because the game uses meta-horror techniques like forced shutdowns and mouse control, it may be flagged by some antivirus software as "malicious" behavior, though this is a programmed part of the horror experience. Always download from the official Game Jolt link

to ensure you aren't getting a modified or truly harmful version. walkthrough for a specific zone or details on how to find the secret ending SONIC.FBX ENDING (SONIC.EYX INSPIRED HORROR GAME)

Sonic.fbx is a psychological horror fan game developed by AlyisWeaver. Inspired by the critically acclaimed Sonic.EYX, this game has gained notoriety within the creepypasta community for its unsettling fourth-wall breaks, disturbing death scenes, and complex meta-narrative. Gameplay Mechanics and Horror Elements

Unlike traditional Sonic platformers, Sonic.fbx prioritizes atmospheric dread over high-speed action. Players typically navigate through corrupted environments where the game itself appears to be a "broken file."

Fourth-Wall Breaks: The "full version" of the game is famous for its ability to interact with the player’s PC. It has been known to change desktop wallpapers, send system-style notifications, and even simulate mouse malfunctions.

Stealth and Persistence: One of the primary mechanics involves moving slowly to avoid detection. Characters like Sonic.exe (or "Nano") will chase players who try to run through levels too quickly.

Multiple Protagonists: Players control various characters, including Tails, Knuckles, and Eggman, each facing a gruesome fate or "possession" by the game's central entity. The Evolution: Demo vs. Full Version

Initially released as a demo for the Luigikid EXE Challenge 2, the project expanded significantly into what fans call the "full version" or "Final Version".

V1.0 (The Demo): A short, buggy experience that ended abruptly with a thank-you message.

Full Version (Sonic Nano): This update added extensive levels for Knuckles and Eggman, multiple secret endings, and a deeper exploration of the "Nano" entity, a creature with multiple eyes and a distorted mouth.

Rewrite/Prequel: A newer project titled SONIC.FBX REWRITE was released as a demo in late 2024, serving as a prequel to the original events. Safety and Download Information

The game’s history is not without controversy. Earlier versions were flagged for containing an IP grabber, which led to a strict update in challenge rules by community moderators.

Verified Downloads: The safest way to access the game is through its official Sonic.FBX Game Jolt page.

Disclaimer: Due to its intense imagery, loud sounds, and system-altering behavior, it is considered unsuitable for younger audiences.

The full version of is a psychological horror fan game heavily inspired by Sonic.EYX. It is known for its aggressive fourth-wall-breaking tactics and disturbing imagery. Gameplay & Features

Playable Characters: Beyond Sonic, you control characters like Tails, Knuckles, Eggman, Espio, and Mighty across various corrupted levels.

Psychological Elements: The game uses unsettling mechanics like claiming to access your location, sending desktop notifications, and resisting being closed.

Atmosphere: Features a "disgusting-looking" plant with an eye and a distorted, one-eyed version of Sonic known as Nano.

Brutal Graphics: Includes graphic death scenes, such as characters having their hearts or throats ripped out. Critical Reception

The "Scare" Factor: Reviewers from platforms like Luigikid Gaming consider it one of the better Sonic.exe-style games for its "terrifying" atmosphere and sprite work.

Technical Risks: Early versions were highly controversial for including an IP grabber and forcing PC shutdowns.

Safety Warning: While later updates reportedly removed the IP grabber, players still report the game attempting to shut down the PC or making the mouse unresponsive during key events.

Watch these gameplay reviews to see the full version and its disturbing endings in action: SONIC.FBX ENDING (SONIC.EYX INSPIRED HORROR GAME) 66K views · 3 years ago YouTube · Luigikid Gaming

Title: Unleashing the Power of Sonic.FBX: A Comprehensive Guide to the Full Version

Introduction

In the world of 3D modeling and animation, having access to high-quality models is essential for creating stunning visuals and immersive experiences. One such model that has gained significant attention in recent times is Sonic.FBX, a 3D model of the iconic video game character, Sonic the Hedgehog. In this blog post, we'll dive into the world of Sonic.FBX full version, exploring its features, benefits, and uses.

What is Sonic.FBX?

Sonic.FBX is a 3D model of Sonic the Hedgehog, created using the FBX (Filmbox) format, a widely-used file format for 3D models and animations. The model is designed to be highly detailed and realistic, making it perfect for various applications, such as:

Features of Sonic.FBX Full Version

The full version of Sonic.FBX offers a range of exciting features, including:

Benefits of Using Sonic.FBX Full Version

Using the full version of Sonic.FBX offers several benefits, including: Import the sonic

Conclusion

In conclusion, Sonic.FBX full version is a powerful tool for 3D modelers, animators, and designers. With its high-poly design, realistic textures, and customization options, this model is perfect for creating stunning visuals and immersive experiences. Whether you're a seasoned professional or a beginner, Sonic.FBX is definitely worth exploring.

Where to Get Sonic.FBX Full Version?

If you're interested in getting your hands on Sonic.FBX full version, you can try searching online marketplaces, 3D model repositories, or websites specializing in video game assets. Make sure to check the licensing terms and conditions before making a purchase.

Unlocking the Power of Sonic.fbx: A Comprehensive Guide

Are you ready to unleash the ultimate gaming experience with Sonic.fbx? Look no further! This article provides an in-depth look at the full version of Sonic.fbx, exploring its features, benefits, and everything you need to know.

What is Sonic.fbx?

Sonic.fbx is a highly sought-after 3D model file associated with the iconic video game character, Sonic the Hedgehog. The ".fbx" extension stands for Filmbox, a popular 3D file format used for exchanging data between various animation software.

Key Features of Sonic.fbx Full Version

The full version of Sonic.fbx offers a range of exciting features, including:

  1. High-Quality 3D Model: The Sonic.fbx file contains a highly detailed and textured 3D model of Sonic, complete with intricate designs and animations.
  2. Advanced Animations: The full version includes a wide range of animations, such as running, jumping, and spinning, allowing for seamless integration into your projects.
  3. Customizable: With Sonic.fbx, you have the freedom to modify and customize the model to suit your specific needs, whether for gaming, animation, or other creative endeavors.
  4. Multi-Platform Compatibility: The .fbx format ensures compatibility with various 3D software and game engines, making it easy to import and use Sonic in your projects.

Benefits of Using Sonic.fbx

By utilizing the full version of Sonic.fbx, you can:

  1. Enhance Your Gaming Experience: Add Sonic to your game development projects, creating immersive and engaging experiences for players.
  2. Streamline Your Workflow: With a ready-to-use 3D model, you can focus on other aspects of your project, saving time and resources.
  3. Inspire Creativity: The highly detailed and customizable Sonic model can spark new ideas and inspire creative projects, from animations to art pieces.

Getting Started with Sonic.fbx

To unlock the full potential of Sonic.fbx, follow these steps:

  1. Download the File: Obtain the Sonic.fbx file from a trusted source, ensuring you have the full version.
  2. Choose Your Software: Select a compatible 3D software or game engine, such as Blender, Maya, or Unity.
  3. Import and Customize: Import the Sonic.fbx file and make any necessary adjustments to suit your project's needs.

Conclusion

The full version of Sonic.fbx offers a world of creative possibilities, from game development to animation and beyond. With its high-quality 3D model, advanced animations, and customizable features, Sonic.fbx is the ultimate resource for fans of the blue blur. Unlock the power of Sonic.fbx today and bring your creative visions to life!

" refers to a horror fan game (creepypasta-inspired) developed by AlyisWeaver, notably submitted to the Luigi Kid EXE Challenge Season 2. Game Overview

Concept: Inspired heavily by Sonic.EYX, this game features a faceless Sonic sprite and unsettling, fourth-wall-breaking horror.

Gameplay: Players control characters like Tails and Espio through glitchy environments where disturbing messages and gruesome deaths occur (e.g., Sonic ripping out Tails' heart).

The "Full Version": The "full" release (often found on Game Jolt) expanded the demo with additional levels, more gruesome death scenes, and secret endings. Controversy: The "IP Grabber"

A significant part of the report on "Sonic.fbx" involves an initial version that contained an IP grabber.

The Issue: The game would pull the player's location, which caused major concern among streamers and the community.

Resolution: The developer later released an updated version that removed the IP grabber, claiming it was originally included for "entertainment" or "spookiness".

Safety Warning: Following this, game challenge rules were updated to strictly prohibit malware or IP-grabbing code. Development Status

Original Versions: The game saw multiple updates (V1, V2, and the Final/Full version).

Rewrite/Prequel: A newer project titled SONIC.FBX REWRITE (and the FBX & NANO Prequel) has been released as a demo, further expanding the lore.

Watch gameplay highlights and reviews of the different versions of Sonic.fbx below: SONIC.EYX INSPIRED GAME - SONIC.FBX Luigikid Gaming SONIC.FBX ENDING (SONIC.EYX INSPIRED HORROR GAME) Luigikid Gaming Luigikid Gaming

Title: Project "Sonic.FBX": A Technical and Historical Analysis of 3D Character Asset Development, Preservation, and Digital Legacy

Abstract

This paper explores the technical, artistic, and cultural significance of the "Sonic.FBX" file—a hypothetical or archetypal representation of the three-dimensional asset files used for the character Sonic the Hedgehog. As one of the most recognizable digital icons in history, Sonic’s transition from 2D sprite to 3D model represents a pivotal case study in computer graphics. This document analyzes the evolution of the file format (FBX), the topological requirements of the character, the migration of assets across gaming engines (from the Dreamcast era to modern Unreal Engine 5 implementations), and the role of these files in the "fandom economy" of game modification and preservation.


What's Included in the Full Version

The Legal Black Box: The Hedgehog’s Prison

Here is the existential twist: A true "full version" of a modern Sonic model (from Forces, Frontiers, or Colors Ultimate) likely does not exist in the public domain because it was never intended to be a single .fbx file.

At Sega, Sonic is a complex node system. He is likely split across proprietary formats (.gma or @U archives), relying on in-engine scripts for his squash-and-stretch effects. The "full" FBX is a translation—a reverse-engineered approximation created by hobbyists stitching together decrypted RAM dumps from a Nintendo Switch.

This is where the request becomes a ritual. When a user demands the "sonic.fbx full version," they are demanding the Platonic ideal of a corporate IP. They want the master file that sits on a locked hard drive in Sega’s Tokyo R&D department.

And because they can never have that file, the community has invented a folklore around it. The file is "out there." It has perfect topology. It has no n-gons. It has a rig that even a beginner can use. It is the digital Holy Grail.

2.1 The Low-Poly Era (1998–2006)

The earliest 3D models of Sonic, appearing in Sonic Adventure (1998) and Sonic Adventure 2 (2001), were constrained by the Sega Dreamcast's 200 MHz CPU and PowerVR graphics hardware. A "Sonic.FBX" from this era would be characterized by:

Where to Find the Sonic.fbx Full Version (Legality & Safety)

Disclaimer: Sonic the Hedgehog is a trademark of SEGA. The distribution of ripped models is often a legal gray area. This article is for educational purposes regarding file formats and 3D art workflows.

If you need the sonic.fbx full version for a portfolio piece or non-commercial fan project, consider these sources: