Selecting UV Faces with Multiple Materials

[Teriander]

I have an object that uses multiple materials and it loads into 3D Coat fine.  How do I select the faces that are using a certain material, so I can use the "Move Selected" option to transfer selected UVs to a different material?  Right now it appears I can only select one island at a time and can not select by Material ID.  Is that accurate?  

[Teriander]

Nobody can assist with this?  Basically I want select by Material in the UV Edtior and move that selection to a new UV Tile.  Possible?

[Gary Dave]

I've just tested this, and my object with different material ID's (from 3ds max) imports into 3dc with those mat ID's as separate UV sets, meaning I can select entire Mat ID's and move them to an existing UV set, or create different UV sets and move them.

 

If your object has imported with just a single UV set, then something has gone wrong elsewhere.

[Teriander]

My problem is that I can either select the entire object faces, or one face at a time.  Not sure how to select only the mat ID.  They are loading correctly as separate UV Tiles, but I am unable to select by Tile.  Am I overlooking a feature? 

[Gary Dave]

Yeah okay, so when you're selecting all the faces, you're actually selecting all the faces of that ID/UV set. If you see in the top left area of the UI it should say something like "default" or "01___Default", this is a drop-down list for your UV sets.

 

If you import for per-pixel patining, then you'll only have access to the UV room to do UV tweaks, admittedly this room is pretty redundant, I don't use it, and you're right in that there doesn't appear to be a way to select multiple faces, I can only select 1 face, or all faces. Not sure what's up with that. BUT, you can still do what you want, since selecting all faces = selecting that UV set. And up there in the top left of the UI, you should see a "[Move Selected]" drop down list, which is where you would choose to move one UV set into another.

 

Or, you can import the mesh to the retopo room, where you have access to UV tools too, you also have access to proper selection tools here.

 

Some things to note, is in the UV room I think you'll need to do a "Apply UV Set" when you make changes, I'm not 100% familiar with the workflow in this room, I don't think many users on the forum use the UV room to be honest.

 

In the retopo room, it's a little weird as well but you first need to select a UV tool (ie, "Mark Seams") and then you'll notice a bunch of new UV tools appear, these are the same as in the UV room, and from these you can perform a re-unwrap/package if necessary, or just alter the layout of your islands manually, there's no sort of "commit/apply UV's" here, if the UV preview looks good, then you're good to go.

 

I would recommend going with the retopo room option, if you need to paint on this mesh as well you can just send it to the paint room when you're done with the UV's, by going to "Bake > Retopo > Per Pixel (no baking)"

 

Laaastly, remember to delete any unused UV sets (accessible from the same drop-down as the UV sets list) to avoid any later complications.

Edited April 4, 2016 by Gary Dave