shadowCasterChannelMask property
The light channels whose nodes render into this light's shadow map, an
8-bit mask (default 0xFF, every channel). A node casts only when
shadowCasterChannelMask & node.lightChannelMask is nonzero. Narrow it
to keep bulky scenery out of the cascades without changing what the light
illuminates.
Deliberately independent of channelMask, which selects what this light illuminates.
Implementation
int shadowCasterChannelMask;