Incorrect texturing with multiple UV maps

[orlade]

I'm trying to import a KMZ into Cesium by first converting the DAE inside into glTF with COLLADA2GTF. However when I import the glTF mesh into Cesium, it doesn't seem to apply the texture correctly to the geometry (the location is deliberately incorrect):

My guess is that it's because the DAE has multiple UV maps and for some reason either COLLADA2GLTF or Cesium can't handle that.

Here is the source file as a KMZ, which you can unzip to get the DAE and images.

Here is what it should look like (KMZ in Google Earth):

However, here is what the DAE alone looks like in Autodesk FBX Review. The second image is the same model as the first, but flipped upside-down.

Do you know either a) if this is a problem with COLLADA2GLTF that can be fixed, or b) if it's a problem with either the COLLADA model or with Cesium, in which case is there an obvious attribute that I can fix?

[pjcozzi]

@orlade any updates? To help find the problem, have you tried the troubleshooting section here - https://cesiumjs.org/2014/03/03/Cesium-3D-Models-Tutorial/

@tfili any thoughts on the multiple texture coordinates?

[orlade]

@pjcozzi I'm afraid not. It wasn't a very common failure mode, so we didn't manage to get to the bottom of it before the end of the project. You can close this if it doesn't seem like a glTF issue.

As for an update on the project(s), I replied to the mailing list.

[pjcozzi]

Let's leave this open in case it is a converter bug, thanks.

[pjcozzi]

Replaced by KhronosGroup/COLLADA2GLTF#116