Make the camera render with shader replacement.
See Rendering with Replaced Shaders page for details.
If the replacementTag argument is not in use, pass an empty string as the value.
After calling this function, camera will render its view with shader replacement. Call
ResetReplacementShader to reset it back to normal rendering.
Additional resources: Rendering with Replaced Shaders, ResetReplacementShader, RenderWithShader.