Enhancement: Bicubic filtering for lightmaps and cubemaps.

[kitrodian]

What would this enhancement be for?

Rendering

Describe your enhancement suggestion in more detail

Forwarded from the P2CE discord (sorta) Half-Life 2's 20th anniversary update added bicubic lightmap filtering when shaders were set to Very High. This simple change drastically improves the perceived quality of a map's lighting in the Source engine and would be a great enhancement for Strata. I think that applying this same filtering to cubemap textures also would help to smooth out their appearance significantly and make them look much better even with lower resolutions.

[kitrodian]

The source code for this is now included in SDK 2013 after the update today. Should be very easy to implement in Strata, I'd hope.