Problem with OBJ exporting

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Problem with OBJ exporting

Postby gordonrobb » Sun May 26, 2013 8:19 am

gordonrobb Sun May 26, 2013 8:19 am
OK, I had this problem with reflections on a flat surface a while ago, and thought it was just that I needed to make the surface non-smoothed, but I've since realised it happens with curved surfaces too.

Create a box in LW and render it reflective with smoothing on, and reflection looks right.

LW_OBJ.jpg


Export it as an OBJ file, and do the same and the reflection is wrong. (even if you then re-save the OBJ as a LWO

Exported_OBJ.jpg


Try the same exercise with a cylinder, same is true.

LW_Cyl.jpg

Exported_Cyl.jpg


BTW this happens if you render the objects in Standalone too.

I've traced it to the creation of a 'vertex normal map' in the surface. It's fine if you set this to none. Here's my problem. I have big complex objects with many UVS, and the quickest way I've found to convert them to singe uv's is to export it as OBJ, re-import it and save it as LW, however this problem ocurs. Fine if you only have one surface, but a hundred, and it starts to get tedious.

Thoughts?
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Re: Problem with OBJ exporting

Postby juanjgon » Sun May 26, 2013 8:43 am

juanjgon Sun May 26, 2013 8:43 am
Perhaps you can try to disable "OBJ write normals" in the OBJ file options to be sure that you don't add a normal map to the OBJ files.

-Juanjo
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Re: Problem with OBJ exporting

Postby gordonrobb » Sun May 26, 2013 8:59 am

gordonrobb Sun May 26, 2013 8:59 am
Juan, that does it.

Any ideas how to stop it renaming the textures to "xxxxxx_Smoothing"?
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Re: Problem with OBJ exporting

Postby juanjgon » Sun May 26, 2013 10:20 am

juanjgon Sun May 26, 2013 10:20 am
gordonrobb wrote:Juan, that does it.

Any ideas how to stop it renaming the textures to "xxxxxx_Smoothing"?


Nope ... sorry :(

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