radianceCubeSize property
Base-mip face size of the prefiltered radiance cubemap new environments
build (the convolved reflection/ambient cube, not the visible background).
Higher is sharper reflections at more memory (a cube is 6 * size^2
texels plus mips); 256-512 is a good default, up to ~2048. Equivalent to
Godot's Sky.radiance_size. Applies only on backends that build the cube
(see effectiveMipRadianceLayout); affects environments built afterward.
Implementation
static int radianceCubeSize = kRadianceCubeSize;