Shadertoy to r_e_c_u_r ports

[xose]

I’ve been working on porting Shadertoy shaders for use with r_e_c_u_r.

Shadertoy runs GLSL ES 3.00; r_e_c_u_r (2.0.2 system image) runs GLSL ES 1.00 on a VideoCore IV. Translating the uniform names takes about ten minutes; the hard part is everything else, and almost none of that results in an error. A poorly ported shader compiles, links, runs, and either displays a green or black screen, or crashes, without a single warning either on the machine or in the interface.

I used Claude Code for the task, creating a subagent and a skill that anyone can use to transform shaders. Both can be used with Z-code, Claude Code or any other agentic AI and can be installed manually or as a plugin. It’s still learning, but after one or two iterations, it gets it pretty right depending on the complexity of the shader. Not all shadertoy shaders fit into the rpi. Read the licenses section before using the ported shaders in a show.

Raspberry Pi 3B system with the 2.0.2 image precompiled by @cyberboy666 assembled together with i_n_c_u_r.

• Ports: terata/recur-shadertoy-ports: Ports de shaders de Shadertoy per a fer servir amb r_e_c_u_r - recur-shadertoy-ports - Gitea
• Agent & skill: terata/agent-recur: Agent especialitzat en transformar shaders de Shadertoy per a fer servir amb r_e_c_u_r - agent-recur - Gitea

[cyberboy666]

nice one! i may have mentioned elsewhere but some other useful links for developing/converting shaders for the recurboy if anyone hasnt seen already:

• a guide on converting shader from shadertoy to recurboy i wrote a long time ago
• web based sandbox by erogenous tones which uses the same shader format as recurboy - you can test your new recurboy shaders on the web - including the parameters and video input (for effects) before uploading to the device..

[xose]

Yes! I fed your post to de agent’s knowledge base but there’s more stuff to change depending on the shader. Some of them don’t even fit inside the Pi as they are on shadertoy. Size and fps usually make a mess when upoloaded to the device. Thanks!!!