This is one of many issues I have with Max 2017, but I was wondering whether anyone else has had this problem.
Corona materials (textures, checker etc) show up correctly in material editor, but once applied to an object just look black in the viewport. If I turn 'show shaded...' on and off, the object has shading visible when texture is turned off, but is flat black on all sides when it's turned on.
I'm currently running Nitrous 11....
...just tried Nitrous 9 and all seems well again. I don't think Corona likes Nitrous 11