Solution for shading - Here we go again, this time multipass rendering 2004-02-14 - By David Bell
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Since Eric has so brilliantly solved the shade multi objects problem
let me lay another related problem in front of the assembled experts....
As many of you know (from one rant of mine or another) I do a lot of
work with multipass rendering and compositing.
One of the issues I face every time I set up a multipass render is when
to freeze the scene and setup the multipass. I have to do this late in
the process because it becomes a nightmare to maintain 8 copies (worst
case) of the scene, one for each pass.
Currently what I do is to use reference shaders, and that is a fragile
solution.
What I was wondering was, is there a way I could set up a scene and
swap in the different shader sets, or alternatively have some sort of
batch process that would scan the Carrara file and tweak the shaders.
(I am a programer of some experience, so I suppose I could do the
latter ... thinking out loud here).
What does anybody think. I would love to see a tool that would make
multipass rendering accessible to the (iaverage Carrara user, properly
used it saves tens of hours, sometimes hundreds of hours(if you are
animating)
Comments anyone?
Yours,
David
Note: For those who haven't worked with multipass rendering, what you
do is take a scene and render it a number of times, once for the color,
once for the shadows, once for the reflections, once for the highlights
... then assemble the result as layers in Photoshop or AfterEffects.
This allows you to tune the effects and how they interrelate (as well
as selective apply filters and the like) This is particularly powerful
in animation. I have one animation where I animated a hydrofoil
sailboat, then in post production animated in the storm clouds and the
waves from still photographs. I was able to do this alone, in a week.
If I had animated everything it would have taken much longer.
Building on this technique, it is possible to construct your scene in
pieces, and pull them all together in post.
I hope this brief description is helpful.
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