EngineDescriptor
What a host knows about an engine before it runs it (rendering-revamp §RVA-3).
In the namespace construct::rendering. Declared in src/libs/libconstruct/construct/rendering/EngineDescriptor.hpp.
Detailed description
Accumulation is a property of the engine, not of a shading tier: the raster engine makes one frame per advance, the path-traced engine refines. A host asks here, never the tier.