| name | 设置的属性的名称。 |
| nameID | 如 Shader.PropertyToID 给定的属性的 ID。 |
| val | 将该属性设置成的值。 |
为 RayTracingShader 的本地浮点属性设置此值。
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 passes (hit groups in DirectX Raytracing terminology) then Shader.SetGlobalFloat must be used.