Exploding blocks with meshes but maintaining the color of all meshes

[intamin]

I have a block that has a bunch of nested blocks and all blocks contain meshes with specific colors, mostly brown. This model is from AutoCAD which in turn was originally a Sketchup model. Neither my choice, haha. I explode the blocks and most of the colors turn gray–but not all, curiously. It’s proprietary so I can only show you the outline.

Before:

After:

I have scoured the web for a solution but this is the closest I’ve gotten:

Exploding Blocks and losing the "by parent" properties

I have a series of blocks on a facade, they are 10 different kinds representing 10 different panels types, these repeat by the hundreds across the facade. As I wanted to apply the color materiality randomly regardless of the type of block, I’m using material “by parent” inside the block and it works perfectly… except when i need to explode the blocks to export the model to my rendering software, then the panel material goes back to the material of the layer in which they are inside the block, a…

And when I use the script, it too maintains the color of some meshes but loses others.

I also tried everything here to no avail:

Explode block instances while keeping their original layers

When I import a file from AutoCAD, and use explode on the blocks they keep their respective layers. But I do notice that the layer in AutoCAD when it is a block, is different then the object layer when it is removed from that block reference. Perhaps the blocks are on separate layers, but as individual objects they were all on the same layer? There is also a Explodeblock command as oppose to explode. Not sure any of this information will be helpful.

Is there any foolproof way to explode a block containing endless meshes but keep the color of those meshes? Rhino runs so slowly with these billions of blocks with meshes in them. I’d love to explode the blocks and merge the mesh but keep the colors intact. Seems like that is asking for a lot, though, haha.

Thanks!

[intamin]

No dice?

[pascal (Pascal Golay)]

Hello- it would be helpful to have a simple example file.

-Pascal