For performance reason, I want to merge all objects created (200+) into a single combined objects.
For this I used something like this : Unity - Scripting API: Mesh.CombineMeshes
Hi Delforges, just to confirm, it appears that you are not using the latest version of ARDK (you can download the latest edition here). Are you able to combine the meshes again using the current release? Please let us know if this helps.
This is very similar to a behavior that we came across in the past. The indices for the mesh seem to be corrupted. I am not sure if this will fix your issue but it might be worth a try.
Please verify that the index format of the mesh is set to Uint32. If not, you can set like follows: mesh.indexFormat = UnityEngine.Rendering.IndexFormat.UInt32;
This is very similar to a behavior that we came across in the past. The indices for the mesh seem to be corrupted. I am not sure if this will fix your issue but it might be worth a try.
Please verify that the index format of the mesh is set to Uint32. If not, you can set like follows: mesh.indexFormat = UnityEngine.Rendering.IndexFormat.UInt32;