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hi everyone, i was working on a project, which there was a a girl sitting and the camera moving towards her, i was asked to settle her in a (3ds max) scene which was a park, everything was chroma so just had to track and composite the footage, i tracked the shot with boujou, it was perfect! i exported my camera to 3ds max and it came well, i matched everything 3ds max vs. the footage,, (fps, resolution.. etc..) then i took a test max preview in order to check if my track was correct.. so by testing i mean i took the preview of the 3d scene and merged it with the main cleanplated footage in “the foundry NUKE” the track was okay.. the only thing that annoyed me was that the girl was big looking in the scene. so i added a transform to the live footage.. i scaled it down. then i tested it, i realized the track was going wrong kind of jiggling around smoothly in x and y. then i tried to scale the main 3d scene in max to make it look big enough, i tried scaling it but, it was useless and nothing changed.
so my main point is what if i want to scale down or up the main footage in a shot when needed, why the tracked footage go crazy and not work correctly?
should i scale the footage or the 3d? or other ways that u guys know about?
When you scale the footage that you tracked you are also effectively scaling the camera move. It will no longer match the CG that is rendered with the tracked camera. To get the scale right you need to make sure you have scale of your CG environment right.
I’m no expert in tracking but I think they usually pick something in the shot that they know the size of and then create that object in the CG and scale everything to match. For example, if you know the park bench in the shot is 2m long, create a cube in the 3D scene that is 2 units long, and then scale the scene up to match the bench.
When you scaled the scene in Max did you scale the camera too? If you did that then nothing would change. Scale the scene but leave the tracked camera as it is.
hey radders, thanks for opening my mind. no, in max i just scaled the environment not the camera.. it actually got big and was a little better than before, but the main thing was that they shot the girl so close.. so thanks i got it..
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