Hello together,
don’t really know, if its my fault, but I made a tool and made a UV map with the UV Master. After I exported that tool the UV map was also in the OBJ and everything worked pretty well. So now, i decided to reload my tool and to decimate it with Decimation Master for later export. But… the UV Map was gone. And that happend twice - do you perhaps know what I’m doing wrong? Might it be that the UV isn’t saved when there is no texture assigned to it?
Kind regards
Clemens
Hi Clemens,
It’s not ZBrush 4.0, it’s the decimation process that’s making your UV information disappear.
Each point/vertex has a corresponding UV co-ordinate or multiple UV co-ordinates. When you decimate you completley change the topology and get rid of your subdivsion levels, this destroys the relationship with the UVs.
As far as I’m aware, decimated models don’t tend to be UV’d and textured, they can have plain shaders, procedural textures or projections, but the triangulated decimated topology is pretty hard to UV.
Although somebody out there might be able to correct me on this…
You could try UV master again after decimation, or one of Zbrush UV tiling methods. But I’m not sure if these work to well with triangulation…
If you want to export your model for something that involves texturing is there any reason why you can’t go with traditional displacement or normal mapping? Or are you interested in baking in other software?
I thought I’d write a quick reply and now it seems I’ve created an essay!
Anyway, hope that helps.
James
Hi James,
thanks for your reply, but it is not the decimation process. UV Master has the option to “Keep UVs” - the UV was still there after I decimated it the first time, and i exported it also that way. Both versions, high and low poly are missing the UV. The exported OBJ of both has the UVs… in both versions.
Ha!
Ok, then ignore eveything I just said!