someone else mentioned this too. not sure what's causing it but it looks fine on my end. I changed some settings and made the window smaller as well. perhaps it will look fine now.
what is the intended way to use this with room_restart()? I've been destroying the crt instance and then restarting the room. there doesn't seem to be a memory leak with this method. if you don't destroy the instance before restarting the shader seems to preserve the previous image before restarting.
