Layered Texture in Maya to Unity?

bpears

How does one transfer a layered texture from Maya to Unity? I am wanting to paint a custom terrain in Maya and import in Unity. Yes, I know Unity has a terrain tool. But I need several odd chunks and things, so it will be better this way. I am aware of the asset store vertex painting tools also, but if there is a way to sort of import from Maya, it would just be a waist of money to buy those.

I read someplace to assign multiple materials that I want to use, in Unity, to the single mesh. But I don't think this would carry over the paint job created in Maya? I would like to be painting at least 4 textures.

Thank you

Farfarer

You'd have to make a shader in Unity that blends the textures together in the same way that your Maya texture does.

bpears

Does Unity have a built in shader (in PRO 4.2) to do RBGA SplatMaps?

Farfarer

The terrain shader is the only one that can do that.

It's not hard to write your own based on its code, though.

bpears

Where can I find it's script, in the wiki? Thanks!

bpears

I guess Unity was actually working on a vertex painter, that would have solved my problems, I think. Not sure if I would still need to write a shader, but they were working on a tool, but seems they never finished it

http://blogs.unity3d.com/2011/03/24/ninjacamp-iii-vertex-awesome/

Farfarer

You'd still need to write a shader - vertex colours are just vertex colours.

You can get the source code for all of the built-in shaders from here;
http://forum.unity3d.com/threads/2085-Builtin-Unity-shaders-source

bpears

Farfarer wrote: »

You'd still need to write a shader - vertex colours are just vertex colours.

But you can use this to paint the blend of textures right?

You can get the source code for all of the built-in shaders from here;
http://forum.unity3d.com/threads/2085-Builtin-Unity-shaders-source

Yeah, I'm looking into splatMaps vertex painting, the Layered Texture in maya uses UV sets per texture I think. And Unity only allows 2 UV sets. So now I'm thinking of just painting with RGBA vertex colors.

I'm getting a bit confused.

Is there a way to modify the terrain painting tool to use on a normal mesh? Or even the terrain tool entirely to work with just a regular mesh? I don't want to actually use a Unity terrain because of all the extra calculations and things in build, limited ability, and other issues.

Farfarer

No, you can't.

I meant that shader is the only thing that can do it native to Unity. As in, this does pretty much what you're after, have a look at it and use or to build your own shader...