> In any case, I'm just guessing. I don't know how those object formats work internally.
> What do you think?

Hmm, well that's very interesting.

One of the things with OBJ is that it supports different attributes on each face. Like 2 faces can share a single 3d vertex point in common, but have different separate entries for uv coordinates or normals. MoI will normally export stuff like this in its OBJ files.

Possibly they do not internally support this type of different-attributes-per-face structure so they have to try to reconfigure the data and that has reconfiguration has some bugs in it.

Can you please try one experiment? Take that shape you show in your screenshot, and export it from MoI as an OBJ but set "Weld vertices along edges" to _off_ (not checked), and see if the OBJ with that setting works better.

When you turn off welding, it will make an OBJ with a somewhat more simple structure, there won't be faces that share a common 3d point but have a different uv for example - either everything (3d point, uv point and normal) will be shared or not. It should be closer to the structure that they seem to use.

Does that seem to work better than before or not?


> EDIT: By the way.. how do you do to see the attached images in the message?

You have to type a little HTML code in your message if you want your attachment to show up directly in your message, there are some details here: http://moi3d.com/forum/index.php?webtag=MOI&msg=68.118

- Michael