Using a glsl custom shader

[kalwalt]

I think that is not possible at the moment, but it would be awesome if the user may use it's own shader with speedy-vision, anyway i don't see any easy solution to implement such a feature, but maybe @alemart you have already think about this? Waht could be a draft idea to implement it?

[alemart]

Yes, this idea has already crossed my mind. It's a very useful idea. It would be an image node that accepted user-supplied shader and parameters. It would output an image. I'll leave this issue open for the time being.