The fix for RT-21998 was to clamp the maximum texture size reported by a graphics card to 4096 (4K). This is more of a workaround, but is necessary to fix problems allocating large textures in some cases.

Once all of the dependent bugs are fixed, this clamping can be removed if desired (although there may be benefits to using smaller textures anyway, so it doesn't have to be done if we don't think there is a benefit).