I was just looking over some nice lunar texture maps when it was made clear to me that due to the back-scattering effect of the lunar soils the default render algorithm of Carrara makes a poor fit. Simply put, the moon is fairly equally lit from edge to terminator. It does not "shade off" towards the terminator, at least not by much. Any thoughts on how to approach this? I'm doing a couple stills, so I'm up for any kind of post-render trick, alpha channel stuff, or what have you. Or a way of building the right isotropic scattering into the shader (perhaps using the Shader Ops Fresnel function?)