Optionalopts: ConstantColorSkyFeatureOptionsReadonlynameStable identifier used for lookup, signature hashing, and pass-name keying.
When false, the feature is skipped each frame. Toggling triggers a cached-graph invalidation.
Active clear color — mutable, re-read each frame.
Initializes
frame.hdrto a flat color. The simplest of the three sky options — no panorama lookup, no scattering integration, just a clear that gives downstream lit passes (deferred lighting, forward, forward+) something to load from. Pick this when the scene has its own opaque background or you only need a solid fill.