shaders are wonky in glbasic
i have a thread somewhere with a couple examples
one of the main things is, you cannot pass vectors like typical shaders code eg. vec2 vec3 etc
To get it to work, you have to split inputs into single values and then pass them into the shader code.
other than that, shaders seem to work as expected, its just alot of work to convert them to glbasic friendly.
ps. no, i don't see enough info on those pages to get started in glbasic....there isn't anywhere on the web that will.
You have to learn the gpu language before even attempt glbasic shaders.
You have to learn minimally about vec2 vec3 vector lists, and be able to expand them into single dimensions as input.