A: Hello,

SelfCAD does not support SketchUp file format so I’m assuming you tried the Collada file. I was able to download and test the same file and I can reproduce the problem but this is not really related to SelfCAD as much as it is related to the nature of the file. Let me explain,

The object itself is not overly complicated and does not have so many moving parts so SelfCAD should have no problem loading them, as long as they are modeled correctly. However, This file consists of thousands of separate objects.

Objects that have too many faces can often take time to upload and can slow down the app's general performance but this only has a few hundred thousand faces which should be no issue. However, even worse than too many faces is too many objects.

Every object needs to have its own memory space and SelfCAD needs to run a lot of functions for each object uploaded individually when converting them into SelfCAD’s topology structure so when loading thousands of objects at once, it takes a lot of time to load.

The sad part is that SketchUp is infamously known for creating non-manifold geometry, and they do not export industry-standard object structures, which is why you can hardly 3D Print an object designed in SketchUp.

I’m assuming the original SketchUp design used components, which are just shallow copies, which means they all share the same object. However, when exporting such objects you make real copies, so you need to combine them into just a few logical parts but somehow this was exported in such a way that almost every few faces make up a completely new object and even worse, most of these objects are broken, so it will take a lot of time to fix them.

For example, this object has a few hundred cylinders and each of these cylinders has a few colors, so this file has a new object for each color and separately for each outside, top, and bottom part, so each cylinder has about 10 objects, multiply that by a few hundred.

SelfCAD and any other industry standard CAD software would have a single object and just different colors for differing faces. Each cylinder would be a closed watertight mesh, combined into just a few bigger objects.

The bigger problem here is that even after you finish loading all, you will still have an issue working with these tiny objects and you would have an issue combining them because they are not manifold. The only solution would be to simply merge them into logical parts and then use The magic fix tool, to solidify and fix the non-manofld issues.

I’m sorry I can’t help more as this is a file-specific issue. I tried converting the original SKP file to an STL using an online converter but they had the same issue. It was running for a long time and then gave an Error, which makes me think the SKP file is also problematic.

Best

Aaron