G’day mate! I have an animation that should be on glasses, but the glasses are made of a continuous surface like Doc’s glasses in the film Back to the Future II. I tracked the animation on the glasses and the track also looks very good now comes my question … I then bent the animation about extende…

This Flame Learning tutorial might help. [Digital Makeup with Extended Bicubics - Flame Premium 2015]

thanks for the tip I’ll have a look at this right away

If you’ve tracked the glasses already (which is how it reads to me) can you use that to stabilise the plate then bicubic your stuff on top of that then apply the track?

@johnt unfortunately not, I tracked different areas of the face with masks that are attached to an axis. As far as I know, it is not possible to stabilize this … but if I am wrong I am open to ideas.

Track it with any thing. Even a one point track. Then you can hand animate on top and it will become easier. Split up the problem into smaller pieces. If it rotates around then split the shot up into sections like frame 1-15, 16-25. Whatever it takes. As a wiser man than me once told me: there’s no…

Just remember to check the inverse stabilise works before doing any work.

at the beginning i tried to stabilize the shoot but then after a short time i got to tracking but you are right i give the stabilization a second first try, what might also work would be a geotrack

It probably would but I’m pretty sure you can track in flame quicker. And you’ll feel like a hero when you e done it.

I fully agree with you i would like to solve this in flame and the world needs heroes.

FWIW: You can track a bilinear, then change it to a bicubic. The 4 corner points will retain the track and the tangents will follow along properly. You can even subdivide and move the points around and for the most part they will retain the original 4 point tracking info.

Track an extended bicubic surface

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randy June 22, 2021, 7:26pm 18

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Track an extended bicubic surface

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