yes i had several problems with not updated uv´s while export to octane using the 2.54 exporter.
While in blender the render looks fine, in octane it does not. (eg.: octane seems to ignore blenders clip/repeat mapping settings, it seems as alway use "repeat" for the image tex. Is there any clip/repeat/checker switch inside octane?)
So i had to do several refinements to the uv mapping, so i often got to correct uv in blender but the changes where not updated while export.
I am not shure why it didn´t work correctly but when i toggle back to blenderrenderengine it seems to update/export uv´s afterwards correctly.
Another strange thing: Inside this blender scene -if material is linked to "data", after export there is no mat available in octane. Material must be linked to object.. than it works!??
It all seems to depend on the blend file, or some special mat/link/mat usercount/relations in this scene i dont know.
I cant reproduce the discribed problems in the moment another scene, but it was a real pain to get it updated to octane wth my mk2 scene.
I never got any similar problems via obj export yet.
If you need further details about build ver etc i can tell you if i am at my workstation again.
- Mint 10 64bit nvidia drv 260.19.29/cudatoolkit3.0 intel q6600, 4gbRAM, GTX470 1,2GB
- Mint 10 64bit/ Win7 64bit nvidia drv 260.19.29/cudatoolkit3.2 amd X6, 16gbRAM, 2x GTX580 3GB
->Octane 2.44/ Blender2.5x