2
votes
1answer
317 views

Full-screen post-processing and texture size

I am newbie writing a post-processing code for mobile devices, and asking some trivial, conventional solution for a specific problem. AFAIK, post-processing in OpenGL is trivially done with FBO bound ...
3
votes
3answers
2k views

How can I make a shader effect that looks like a lightly shaded pencil drawing?

I want to make a shader effect using OpenGL ES 2.0 that looks like this image: I'm not sure if this image was painted or is the result of some filter, but I want to create a shader that produces ...