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I'm relatively new to Blender and trying to import an architectural render from SketchUp 2017.

I export from SketchUp with Collada, then import, and end up with something like this:

Import issues

The meshes with problems do have two materials:

Two materials set at the same time

Putting the correct material on top helps some. Deleting the secondary material helps some of the time, but not all of the time.

Any ideas what this is? I've heard that importing from Collada can require hours of cleanup, but in this case am not sure where to start.

Thanks!

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    $\begingroup$ look like Z fighting to me. See if there are any doubled up faces. That could be duplicate objects in the same spot, or duplicate faces in the same object. $\endgroup$
    – David
    Commented Feb 13, 2017 at 3:24
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    $\begingroup$ Yup, that is not caused neither by materials nor textures, that loks like Z-Fighting to me, which is cause by overlapping geometry or coinciding faces. That means it's cleanup time, and one of the reasons why Sketchup is such a clumsy modelling tool. $\endgroup$
    – Duarte Farrajota Ramos ♦
    Commented Feb 13, 2017 at 3:26
  • $\begingroup$ maybe duplicate of blender.stackexchange.com/questions/70913/… $\endgroup$
    – atek
    Commented Feb 13, 2017 at 5:08

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Thanks for the comments! Yes, it was just normal Z-fighting (no pun intended).

Once I removed duplicate vertices, I could apply the textures and everything worked fine.

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