So I came to find out that there are two ways to render:  Gamma correction on or off.  If you are not rendering with Firefly GC on, you will need to have your shaders perform the GC.  I was wondering:  Do all vendors provide shaders that are for rendering with GC off?  Have you come across any vendors who provide shaders for both so that the end user can choose which way to render and still get the same results for the product?