obj use same material must use same texture for lightmap????

anon_97780922 · April 9, 2009, 3:32am

The objects use the same material must use the same texture for lightmap??
e.g.
there are two objects named “obj01” and “obj2” use a same material,and they have diffrent lightmaps.Import them into the
unity3d,it looks they can’t use diffrent lightmaps.How to resolve it except merge them to one.

:?: :?: :?: :?: :?:

anon_97780922 · April 10, 2009, 1:10am

Bump…

anon_62027889 · April 10, 2009, 9:23am

To support you, i’ve the same doubt
Someone helps?

scarpelius · April 10, 2009, 10:11am

how about create a second material from existing one and replace the lightmap?

anon_97780922 · April 11, 2009, 1:55am

I think you are talking about this
http://www.unifycommunity.com/wiki/index.php?title=UVTransfer

anon_97780922 · April 13, 2009, 1:17am

Bump…

anon_31512273 · April 13, 2009, 3:50am

I just combine the objects in Maya and create a 2nd UV set and assign an auto-mapping on it and bake the lighting into the 2nd UV set. Then I separate the objects in Maya before import into Unity. This way the objects have the same material and lightmap, but the lighting info is different on every object. I hope that helps.

anon_97780922 · April 13, 2009, 7:42am

:?: :?:
Thank you very much,and I have some problems

Did you use this script ?
http://www.unifycommunity.com/wiki/index.php?title=UVTransfer

After I used it,I can’t use diffrent lightmaps in the same material and texture of objects…

antenna-tree · April 13, 2009, 7:49am

You need to make new materials with different textures and assign those new materials to the appropriate meshes.

anon_31512273 · April 13, 2009, 4:49pm

No, I have never used that script.

These are the steps I use:

In Maya:

Assign UV’s to the one object
Transfer the UV’s onto the other objects.
Combine the meshes
Assign 2nd UV set to the combined object
Perform Automatic Mapping
Bake Lighting onto texture using the 2nd UV set
Separate the objects
Rename them
Export them

In Unity:

Using Lightmap shader, make sure the diffuse texture and lightmap texture are in the appropriate slots.

Now you have 20 uniquely lit crate objects with only 1 material, 1 diffuse map, and 1 lightmap.

That is the way I do it, but you could also just make 20 different materials each with it’s own lightmap.

anon_97780922 · April 14, 2009, 8:39am

Thanks very much, everyone,I am going to try it again.