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some 3D layer issues.
I know that when working in a 3D environment, the layer order no longer determines what you see and that you have to work in regards to 3D space.
So, I have this man that I’d like to stand on this floor (both are 3D layers).
As you can see, his front foot is sinking into the floor.
Now if I move him up in Y space, his front foot will be out of the floor; but his back foot will be floating in mid air.
Due to his stance, I can not get both of his feet to sit nicely on top of that floor:
(Excuse the crummy cut out job)
Now, I can think of a few lame solutions. One would be to put that front foot on it’s own layer and move it accordingly in Y space. Option two would be to separate that foot in photoshop and reposition it so that it was positioned more inline with the back foot.
I don’t really want to do either of those being that I’d have to do it repeatedly.
So, if you have any suggestions, I’d love to hear them.
Ps, sorry for all the posts regarding 3D projects lately. This is my first 3d project and it’s been giving me hell =P
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17 Replies
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Why don’t you try to mask out the foot.It’s sipmle enough to use the pen tool and I’m pretty sure you’ll get the needed result.
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yep, that’s another option. That’d be the easiest I suppose. I guess I was hoping that there would be some settings or something. Anyway, thanks for your help.
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In 3D programs, you would rotate the floor or the model. Since he is standing on a floor when you took the footage, then you should be able to tweak the Z axis so that it sits correctly – pull it up for the foot that is farther back and down in the foreground would be my guess…
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Yeah, I understand. Only I’m not a full 3D app, I’m in AE. If I tried tweaking the floor at this point, it would mess up my angle with the walls. I think I’ll just duplicate the layer and mask the foot off.
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If you shot him standing on a flat floow, then you shouldn’t have issues getting him to stand on a CG floor, in AE’s 3D environment.
If you’re concerned with the walls and ceiling going out of their relative positions, then parent all the relevant layers to the floor, except for the couple, while you adjust the fllor. Hold down te CTRL key as you scrub to make minor tweaks to the floor’s rotation/orientation.
HTH
Roland Kahlenberg
https://www.broadcastGEMs.com – Adobe After Effects project files
https://www.myspace.com/rorkrgbspace -
You couldn’t parent the walls etc and move the floor so they all move equally in 3d space?
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Hmmmmmm. Yeah. I could.
I’ll try it out.
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the easiest way would be to try and keep your 3d camera at the same (or very simialr) angle as the camera that shot the subject… or reshoot the subject with the camera angles you want in the 3d comp.
the height of the real camera looks to be at or slightly above eye level, keeping the comp camera at about subject eye level should help maintain the illusion.
Kevin Camp
Designer – KCPQ, KMYQ & KRCW -
You can trick AE’s 3d system by sandwiching an empty adjustment layer between your ground layer and the man layer. Any 3d layers below the adjustment layer will not intersect with layers above it. I have no idea why this works but I use it all the time.
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i haven’t tried this…but i do dabble in photography…and the thing that strikes me is that you should try to ensure the focal length of your virtual camera is the same as the one used to take the photo. So if you had a 28mm lens on the camera,ause a 28mm virtual lens.
adam
Editor/Mixer
Character Options Ltd
Oldham, UK
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