TracerParamDef
One declared tuning parameter of a tracer module.
In the namespace shader. Declared in src/libs/libshader/shader/TracerModule.hpp.
Detailed description
The tracer sees parameters only through TracerParams slots (sdf-raymarch-quality §RQ-6.1) — it never reads a uniform of its own. slot names the field it lands in: one of the four standard budget fields, pixelConeTan, or a component of the two free vectors (user0.x … user1.w).