GroundPlaneUniforms
The uniform block of GroundPlaneLayer.glsl, byte for byte (std140).
Declared in src/libs/libconstruct/construct/layers/GroundPlane.hpp.
Detailed description
The colors are linear light: the gamma pass encodes the frame after the ground draws, as it does for the background. GroundPlane::update() writes every color field from GroundPlaneColors on every frame, so the struct holds no default color.