every time I push P this message pops up
shaders not supported means like me your graphics card cannot do GLSL shaders.
GLSL materials aren’t working for me either. I’ve enabled GLSL in the game menu, but nothing is any different. I don’t get any sort of message though. I suspect that it’s a driver bug. I had a different issue with the node preview windows (and I wasn’t the only one), so it wouldn’t surprise me if it was related.
hopefully it will be fixed by the time it’s a finalized build.