Loading screen + fallback background

[SmashMaster]

Many computers cannot quickly run complex fragment shaders at high resolution, but all computers can quickly rasterize primitives, and run simple fragment/vertex shaders.

Make a new background that has thousands of particles being slowly perturbed by a noise map. It will run smoothly at high resolution, and it might look really cool.

[SmashMaster]

Just add a loading screen with a background frame rate test. If the computer can't render the demo at a steady 30+ FPS, or can't run it at all, just put up a static JPG background instead.