First posted at 5:24PM Tue, 29 October 2019 - #4368511

What I would like to know now is if there's another way besides boolean to get this done. Is there?

Try the BOOL TOOL addon in Blender. This will allow you to select every object once, and just apply a Union operation. I tried it on 20 duplicate cubes and it worked fine in less than a second using the Auto Boolean feature. Once you install the addon, just press N for the sidepanel. It will appear under the Edit tab. Just quickly select all the cubes (doesn't matter the order) and press Union button. Make sure they are not instances. They have to be copies.

If you're dead set on not using Bool Tool for some reason, or if the operation fails you, then there are only a couple of solutions left that are perhaps less than desireable but may work. First would be to join all the objects as one, then apply a remesh modifier. This may not be a great choice, because in order for it to voxelize the objects together, you'll need an Octree Depth of around 7 or 8 (which will produce a very dense mesh), and a low threshold (around 0.15 or so). If your computer isn't powerful enough, this could very well crash Blender and it may not be the result you are hoping for. However, if you can get that method to work, then you can apply a decimate modifier on top of that to reduce polygons, or just retopologize the mesh.

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