Bricks in Motion
We are a friendly filmmaking community devoted to the art of stop-motion animation using LEGO® and similar construction toys. Here, you can share your work, join our community of other brickfilmers, and participate in periodic animation contests!
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We just made an entire LEGO CGI alphabet. It took a lllloooonnnggg time, but the result was great! We may eventually have it available for download.
What I've done is take a reference shot (assuming the camera is static and you have nothing else in the set to use as a reference) of the greenscreen set with a set of reference pieces in the shot. After that, I remove the reference pieces and start animating.. In CGI, I have the same set of reference pieces built and position the camera as close as I can so that the CGI reference pieces match the real reference pieces. The rest involves matching the right focal length and lighting.
The greenscreen is not necessarily at an angle. The set can be as well. If you want to be exact, then you'd have to take measurements.
The baseplate in both shots were used as reference to set up the camera angle. The greenscreen was not angled, the set and camera was.
But that would be incredibly hard to angle it the exact same. Oh and sorry BG, I thought that minifig was made by you.
Hm, I remember in Leonardo's Plant CG Breakdown video that in one shot he used 3D camera matching. Perhaps he would enlighten me on this, as it seems much easier than carefully lining it up.
Camera Mapping
Edit: Scratch that, it's for making 2D images look 3D.
Last edited by Lechnology (July 10, 2010 (05:29pm))
Tell is leo 
EDIT: BG, where is that video?
DOUBLE EDIT: nevermind i found it
Last edited by eoh49 (July 10, 2010 (05:50pm))
The other thing you can do is similar to this which I've also done when adjusting the camera is too difficult.
In a 3D scene with your 3D reference piece located at (0,0,0) with 0 rotation on all 3 axis, position the 3D camera as best you can to match the photo piece with the 3D piece, then move/rotate the piece around to get a better match (along with changing the focal length). Moving/rotating the piece around is much easier than rotating the camera. Once you have the 3D reference in a matching angle, location and focal length with the image reference, mount the camera to that 3D reference and reset the 3D reference's position and rotation back to (0, 0, 0). By mounting the camera to the piece and resetting the reference piece, the camera inherits the inverse position and rotation of the piece, thus virtually matching the actual camera. From there, add your CG set.
Of course, if you're that lazy, try using Voodoo. Seems more ideal for moving cameras than it is for static.
Last edited by Lechnology (July 10, 2010 (06:05pm))
I really wish leonardo or nick durron would see my question 
PM them, but I'm certain there's not a lot of other ways to camera match, why else did it take until recent years for films and TV shows to integrate CGI elements.
I'd like to get started with CGI to make 3D backgrounds since I can now do green screen. I opened up blender read tutorials watched video tutorials and couldn't do a thing. All I could do was move the cube around with my mouse. I need very basic help.
Bricky, if you go back a couple pages, I was at the same stage you were and I asked alot of questions so some of the questions that I asked my help you out.
I looked all the way back to page 2. I could only find 2 of your questions, I need very basic shape construction.
If you are trying to make something in Blender, I have no idea how. I just import models that i made in Leocad and then do a bit of editing on em. Look at this thread Bricky. Those are my questions.
I am just learning to make CGI, I have Maya 8.5, and I have done many things, I would like to learn how to make lego in CGI.
Does anyone else watch blenderguru?
Never heard of it
Hehe, one of the figs is moonwalking.
Hehe, one of the figs is moonwalking.
lol
I swear I've looked over that at least ten times and never noticed. Funny how that works.
I'm afraid to use Blender. 
Is it as hard as it looks?
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