[REQUEST] Supersampling

[hurleybird]

I played around with Piccu engine in 4K for awhile, but came to the conclusion that the game looked much more coherent at a lower resolution.

I'm currently enjoying 1366x768 with MSSA, and graphically I like the look of the game more with these settings.

An option to use SSAA rather than MSAA would create an even smoother, more robust image, and help reduce noise in textures with small, high contrast, repeating details.

[leilei-]

Keeping an eye on this myself as it'd require shaders. Only OpenGL knows of MSAA so it's not trivial.

OpenArena/engine#87

[hurleybird]

Doubt it needs shaders. I'd be surprised if there wasn't a way to render at a higher resolution and then downsample.

[InsanityBringer]

The downsampling is the tricky part. Simply blitting it to the smaller output framebuffer won't accumulate samples, even if you use GL_LINEAR as your minification filter. At least for higher sample counts, it might be possible to coax out a simple 4x scheme if you're careful with your texture coords and only make the offscreen buffer 2x as large.