"Transform Controller plug-in for 3D Studio MAX. The behavior of these controllers can be compared to Linear and Smooth Rotation, but rather working on any transformation. They will interpolate between any keyframe transformations, but won't give control by function graphs. This is because the transformations are not decomposed into translation, rotation and scaling parts. The good thing is that the user is free to combine transformations in any order, switching between coordinate systems as he or she pleases."
Download Mcontrol by Kees van Prooijen.

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