Hello,

Here's a convex, closed model I've made for Geometry Level of Detail (LOD). It's just a quick example of a problem I've encountered. This model was created by me and it can be publicly accessed here.

I'm using Blender 3.5.1 with Enfusion tools installed. My model successfully passes the Non-Convex check.

However, when I import it to Object Builder (OB), it fails the Find Non-Convexities check.

Applying Component convex hull ensures all components are convex but it also creates holes in the geometry, which leads to a failed Find Non-Closed check. Alternatively, it can completely distort the geometry, as in this instance, even though it was convex and closed before applying the Component convex hull.

When I export it from Blender as an .obj file, the situation gets even worse. OB identifies all (or nearly all) vertices as parts of the non-convex geometry. It's worth mentioning that this is a simplified version of an issue I've been dealing with for a long time. When I'm creating Geometry LOD for more complex objects like buildings, there are many more areas that OB marks as non-convex.

Also worth mentioning that applying scale to the object in OB affects model convexity. For example we have a model with 26 points found as parts of non-convex geometry.

Scaling up model 10 times by using Scale tool in OB results in 59 points marked as non-convex.

Does dev-team have any suggestions on how to import to OB without losing the convexity of the model? I'm getting tired of manually recreating the problematic faces in OB, especially when a model has tens of them.