| 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.
Only shaders defined in the .raytrace file can access the value you designate as the argument for this method. To make this value accessible to all ray tracing shader types (closest hit, any hit, miss, etc.), call the Shader.SetGlobalFloat method instead.