Since these parameters are exported as extra children in the effect's texture element, I don't need to do anything at import time if these parameters are imported as well. Still, I added some logic to get back the parameters from the texture surface if they're missing. FViewer: I added some code to disable the use of placement matrices in FRTexture when the texture is bound to a NURBS surface. Bottom line: Max -> Export works, import does not. Maya -> Export works, import works for all Maya-generated files and some isolated cases of Max-generated files. Viewer -> Can display the export data of both Max and Maya.