I have a (quite simple) model which is composed of 1x1x1 unit blocks (a voxel structure). Those blocks were joined into a single model and had their doubles removed.
Please find an example in this blend file: blocks.blend (552.8 KB)
My question is: how do I get rid of the internal faces?
I know that there is Select -> Select All By Trait -> Interior Faces. The problem is that it doesn’t work in this case. For many faces, all four vertices which make up the external face also contribute to internal faces and thus are selected by this operation. The issue is that the external face is then also selected (that’s just how selection in blender works).
There is also this question on stackexchange which is essentially what I would like to do as well, however it has gone unanswered since 2014 (!!).
I also tried a different approach, by modeling the cubes as object and then using the BoolTool Addon to compute the union of all cubes, but unfortunately the result is a complete mess.
Any advice on this matter would be much appreciated.