| name | 设置的属性的名称。 |
| nameID | 如 Shader.PropertyToID 给定的属性的 ID。 |
| val | 要设置的浮点值。 |
Sets the value of a float uniform.
The value specified as argument can be used only by the shaders defined inside the .raytrace file associated with the RayTracingShader. If the value needs to be visible in all ray tracing shader types (closesthit, anyhit, miss, etc.) then Shader.SetGlobalFloat must be used.