I think this will sound stupid ... but I have to ask.
Running a simple fragment program (4 instructions, 2 TEX, 1 ADD & 1 MAD) renders smoothly.
Running a bit longer prog makes drastically frame rate fall (4 MAD are added).
Does this makes sense ? I intend to render all the scene with the second fragment program, at 1600 * 1200. Of course, lowering resolution to 1024*768 makes it all smooth.
What are the common way to improve this ? Render front to back would make it ?