"Is that the same as putting a rectangle primitive prop in the scene? And as for attaching the .avi, well i created a 'rectangle' prop, went into the materials room and WAS able to get a the movie attached to the 'difuse color' node for the rectangle....but nothing resulted." Yes, it's the same as a rectangle primitive prop. As for viewing the results, have you tried to render it as LD has suggested? You could also do the rotoscoping in a video editor in post. What kinds of post applications do you have access to? There's different ways to do it depending, of course, on the editor.

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.