Shadertoy Custom Textures is a free Chrome add-on developed by ahills that allows users to temporarily use custom 2D textures, music, and videos in Shadertoy. With this add-on, users can easily load image, audio, and video files by simply dragging and dropping them onto the texture preview slots.

One important note is that the add-on only supports 2D textures, so users cannot load 3D textures. Additionally, loading images from the web may be blocked due to cross-origin HTTP requests not being allowed on their servers. However, users can still load text and web links starting with "https" due to mixed content restrictions.

Version 1.4 of Shadertoy Custom Textures has removed unnecessary tab permissions, improving the overall user experience. In Version 1.3, the add-on added support for audio and video files, allowing users to further enhance their Shadertoy projects. In Version 1.2, custom loaded textures now use the same ID as one from shadertoy.com, ensuring that projects can be saved without any issues. Additionally, the annoying "changes you made may not be saved" popup will no longer be triggered when loading a custom texture over an existing one. Finally, in Version 1.1, the add-on now reads the texture filter and wrap settings from the correct place, streamlining the customization process.

Shadertoy Custom Textures is a valuable add-on for Shadertoy users looking to expand their creative possibilities by incorporating custom 2D textures, music, and videos into their projects. Try it out and take your Shadertoy experience to the next level!