#How 2 get best key 4 3ds
6 messages in this thread
I have a .gif image of some mountains in the distance. I also have an object
that I want to place in between those mountains, animate it to move around the
mountains and come up to full screen.
I get the animation part, but how can I put that object into the .gif from just
3dStudio? Do I need Photoshop or some other type of program to accomplish this
feat? In broadcast, they call this keying. This is sort of what I want to do,
but I need to make the object appear behind a range of hills and then in front
of it, and I don't kow if keying will work in this manner.
Anybody have any suggestions? I'm using rel 2 and waiting for rel 4 to arrive.
mdawson
I don't think simple keying will do it for you but a form of rotoscoping will.
I would take your bitmap into photoshop and create some clips from that image
separating the foreground and background mountains. Then I would place the
foreground mountain as an object in my scene using a combination opacity and
texture map. In this way you can render the moving object going around one of
the mountains.
Cool! I'll give it a try. Thanks for the reply!
mdawson
Hi,
If you have access to a magazine called 3D-Artist, an article in Issue # 14 a
couple months ago, covered your situation exactly. The article was actually
written as a how-to for Real-3D, but the concept will work just the same in
3D-Studio. Call 3D-Artist at (505) 982-3532 for that back issue or to
subscribe (its a cool 3D magazine, lots of practical info).
Basically what the article said was to create an object which, from the
camera's viewpoint, matched the outline of the mountains, then make that object
a "matte" object (see your manuals to see if this is possible in R2, I think it
is, but I have never actually used R2, only R3). Then all you have to do is
animate your moving object using the "matte" object to hide it while setting up
your image of the mountains as the background for your animation.
This and Don Landis's suggestion work out to basically the same results, just
two different approaches. Don's might be a little easier, but I figure its
always good to hear as many ideas as possible.
Regards,
Brandon
This and Don Landis's suggestion work out to basically the same results, just
two different approaches. Don's might be a little easier, but I figure its
alwayse the parts of the scene as texture
mapped objects in the keyframer.
You're talking about compositing, which is the main purpose of Video Post. Use
a paint package to chop your mountain images into two or more pictures and then
assign them as layers in the Video Post Queue so you can animate your object in
front or behind them. Take a look at the Video Post tutorial for more on
developing the proper transparency, etc. for the images.
– Jack