OTOY Forums

Hi guys, I have a geometry issue with the Sponza model... I checked geometry, normals, phong's angle, bool smooth in Octane but nothing seems to solve this bug.
See the attached images. C4D R13
Thank you in advance!

awesome I love it

try to manually quadrangulate whatever 4+ sided polygons you have there

i suggest to delete the normal tags and to lower the phong angol to about 20 for rounded low poly geometry
ciao beppe

The normals on the wall above the arc look broken to me, it should be plain red like the wall behind the arc.

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Roeland

roeland wrote:The normals on the wall above the arc look broken to me, it should be plain red like the wall behind the arc.

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Roeland

Yes they do look broken but in renderfarmsrl's screen grab of the normals displayed thay are not. I have had this issue with a couple of downloaded models and was unable to find the issue. The normals were all correct in Maya, I even took the model into Maya and cleaned up all the geo, exported the geo as an Alembic cache (which usually fixes everything) and then re-exported an obj to Octane Render and still had the same problems. The only solution I found was to rebuild the offending geo by hand using Maya's native tools, delete the original and then re-export the obj, of course I didn't need the UV's to match the original.

T.

I have noticed at least with blender i get similar problems if i use really huge geometry (500m+).
Have you tried scaling the whole thing down?

Cheers
FooZe

Hi guys, I did a second version using the "triangulate" command... to convert any quads into tris. Then I exported to octane... it seems that the problem is still alive
See the attached images... by going deeply, I saw that also materials are affected by this issue...
Thank you in advance!

Hi Guys,

This is what i was taking about when i have problems with geometry that is too large.
I made a simple 2 cylinder model to test. I made it big enough to get problems then scaled the exact same thing down by a factor of about 150 then re-exported from blender, updated the obj in ocatane, re-arranged the camera to get the model into view again and all was happy.

Cheers
FooZe

Thank you for the answer FooZe... Do you think it's a plugin issue or an Octane obj import failure? (.. I'm not very happy because I don't want to do all those crazy steps to reach a very standard result!)