# 3d Rotations in a mask. not working

**URL:** <https://forum.kirupa.com/t/3d-rotations-in-a-mask-not-working/317501>\
**Category:** Uncategorized\
**Created:** [December 22, 2010, 9:03pm UTC](https://forum.kirupa.com/t/3d-rotations-in-a-mask-not-working/317501 "2010-12-22T21:03:38Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ghadimi](https://avatars.discourse-cdn.com/v4/letter/g/9dc877/32.png) [@ghadimi](https://forum.kirupa.com/u/ghadimi)\
**Post date:** [December 22, 2010, 9:03pm UTC](https://forum.kirupa.com/t/3d-rotations-in-a-mask-not-working/317501/1 "2010-12-22T21:03:38Z")

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Hi;

I’ve hit a wall trying to get this to work:

- I’ve created a movie clip that contains 14 layers, each layer is a 3D Y-rotation using a motion tween on a movieclip object (just a solid rectangle)
- Trying to emulate a venetian blind transition effect
- When I put this “mask” movie clip on my timeline, it won’t allow me to use this as a mask!!
- I tried setting up the mask in AS3 as well, using imgMC.mask = maskMC;

Does Flash allow this? Can I use 3D motion tweens as masks? it doesn’t seem to allow it. I was hoping maybe I missed something. Appreciate the help.

thanks;  
j.