You can draw a Garbage Matte (referred to as "mask" also) and change its setting from instead of making the object transparent, make it opaque. That way you can just put the matte over the chrome parts of the wheels and just move it every few frames (Chromanator will automatically create an equal rate of change between two points if something changes between both points).
Here's a short tutorial I made.
FIRST THINGS FIRST - Go into Object Mode (with the object of choice selected).
Now, we go into Garbage Matte mode (right next to Key mode) and press the + sign to add a new mask.
Good, our new mask has been identified and is ready to draw. Notice how it is in Draw mode. We'll go back to that later.
Here's a photo from my first test involving a toy car and horrible lighting. I just pointed out a few of the spots where the car was either transparent or chrome and Chromanator keyed out. I will only be showing how to prevent the keying out of the wheel in this tutorial.
Click on a spot in the wheel to start drawing a mask. An 8-shaped point, indicating the first point, will be drawn. The rest will be diamond-shaped. You simply need to click - no holding and dragging is needed (unless that makes it easier for you. Just click and it will automatically connect the previous point to next one you draw.
You're almost done drawing the mask - but it's not closed yet. It's not effective until it's closed (for obvious reasons).
You can draw a stray point and just drag it over the 8-shaped point to connect it. You will know for sure that it's connected when a partially transparent light blue color fills the now completed shape.
OPTIONAL: You can use the Smooth Points slider to, well, smoothen up your points. It's possible to make a diamond shape and use the smooth point option to make a diamond into a circle, but that's different. Here, the car is at an angle, therefore we need to draw it on our own.
Now click on the animate tab. Notice how the light blue overlap changes to red. It's ready for action (NOTE that ALL masks are not functional until switched to animate mode!!!!!). Take a look at the tab that says "Transparent Matte". This means that anything under the mask will become transparent. We don't want that - we want the opposite.
Click on the little tab next to Transparent Matte. It will open a tiny little bar with the two options. Click Opaque Matte.
All right! That's all there is to it. Now let's take a look at the difference between the wheel -
Much better! Now you can apply this to anything.
Hope this helps!
- Lithium Kraft
EDIT: Thank you Swg33k. Never heard of that weird organization. But thank you.
Last edited Tue, 27th Sep 2005, 1:49am; edited 1 times in total.