You CAN preview gloss in maya, if its before 2013. Either High quality or viewport 2.0 should work. Just make sure the gloss map is on the alpha of the specular, and connect through hypershader the alpha output of the gloss map to the cosine power of phong. Reflectivity (reflection mask) and Diffuse works the same way.…
Same thing happens to me in Maya 2012. I have imported 2 different .fx files (Xoliul Shader and lcnextgenshader1.2) and neither of them are displaying anything. My mesh persists to display the default white (or green when rendered) material associated with the Hlsl shader. When I add my diffuse texture and specmap, the…