once we get the gamma postfx working again, we'll need that to allow reflectivity. (gammaP.hlsl is run when hdr is shut off)
basic clouds correction for later. see https://github.com/Azaezel/Torque3D/commit/bc041b6f5ba7deb06e168347132e00810c6e3bb7
scattersky sun banding correction for later. see https://github.com/Azaezel/Torque3D/commit/110f8ce9817853ac1fda64f2c9bb1ee42b846e23