I would like to create my terrains in C4D … but I noticed when I import my mesh into Unity, I can’t use the paintbrush tool like I can with terrains created in Unity.
What program can I use to paint my terrain?
In stead of exporting your terrain as a mesh, export it as a heightmap and create a terrain based on that in unity.
Thanks so much for that info. Do you or anyone happen to know how to export heightmaps / displacement maps in C4D … I’ve been google’ing it and can’t find any info.
How about assigning a surface shader with a black-to-white ramp on it and rendering it with an orthographic camera from the top on a black background? Works like a charm for me with Maya!
Also I just researched that the new Photoshop CS4 extended comes with 3D painting… you can now paint your 3D models right in the app.
http://www.adobe.com/products/photoshop/photoshopextended/
I think this is what I will need.
Notice that you model would still not be functional terrain though. You would address it as a regular 3D object and would be unable to paint trees on it.
uuggghhh you’re right 
I forgot about the trees and plants. I’m less than a week old to all this 3D gaming stuff so I still have a lot to learn. It’'s just so confusing sometimes.
Maybe it would help if I also explain my problem.
My games will target the iPhone… and as suggested by the Unity team… the built-in terrains should not be used. BUT if I can find a way to make my height maps low poly… then that would be great.
I just don’t know how or where to do it.
Theres a script somewhere called grassonmeshgenerator.js search forum for it? It doesnt support older cards though. Also go to download.com and check out bryce5.5
Does someone have a link for the original nature file with the grass scripts and shaders? I lost a HD and away it went…
AC
What’s wrong with the built-in terrains? Where did you see that?
The terrain engine eats way too many graphical resources to run on the iPhone.
http://forums.cgsociety.org/showthread.php?t=217314
this link might help