We track with perspective because: a. The surface is pretty flat b. The object is actually in fact changing perspective c. This is not an organic object. And since it is flat, perspective is perfect for this
@borisfxlearn
2 жыл бұрын
Correct on all counts.
@rahuldeshpande3516
2 жыл бұрын
@@borisfxlearn thank you!
@ronydey2696
3 жыл бұрын
Great tutorial about rotoscoping sir these is really a much helpful hi myself Rony an VFX student from India
@borisfxlearn
3 жыл бұрын
Thanks very much!
@eladet11
5 ай бұрын
First I wanna say thank you for answering my questions. I followed along but for some reason it didn’t work well when tracked backwards :/ One question: When should we use the dope sheet to delete keyframes before tracking? In 18:15 you tracked backwards but didn’t delete them for some reason… *I thought that if I track - it just overwrites the other keyframes.
@eladet11
5 ай бұрын
I see that you commented that it overwrites.. :)
@rahuldeshpande3516
2 жыл бұрын
The reason the mouth works is because the mouth and goggles have almost the same relationship with the camera. If she doesn't move her jaw left/right, and if she just moves her head around, then the relationship of the mouth and goggles with respect to the camera stays the same. Hence, we can use it.
@rahuldeshpande3516
2 жыл бұрын
Whicb is also why we could weirdly use the nostrils at the end of the video. This is because the relationship and movement is similar. The thing to remember is this is an area tracker, a planar tracker - so this works out
@borisfxlearn
2 жыл бұрын
That's it. You've got it.
@rahuldeshpande3516
2 жыл бұрын
@@borisfxlearn thank you!
@bobbihansel
3 жыл бұрын
Very interesting to see the work around. Is there a chance you might have covered a similar work around for global tracking interference within a shot - for example, shallow underwater track with sharp caustics flowing over every surface (mainly just a ground plane)? I'm finding it difficult to pull a successful forward dolly track over such a shot and would greatly appreciate any insight.
@borisfxlearn
3 жыл бұрын
Sharp caustics can sometimes be fixed by using a Matte Clip as a track matte above the layer you want to track. This is an advanced technique and we don't have a handy tutorial for it. I will add it to our list though! You can see how to use Matte Clips here : borisfx.com/videos/mocha-pro-solving-complex-object-removes/
@bobbihansel
3 жыл бұрын
@@borisfxlearn brilliant, will take a look. Many thanks!
@tief1975
Жыл бұрын
is there any difference between deleting the bad keyframes or re-tracking them? is it better to delete them?
@borisfxlearn
Жыл бұрын
In the olden days, old tracking would have an effect when you re-tracked. This hasn't been the case for many many years but it's still a good habit to get into. It makes it much easier to see where you've got to in your good track. If you're using Mocha Pro, there's a good quick tip about doing this with two clicks here : borisfx.com/videos/mocha-pro-get-rid-of-bad-track-data-fast/
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