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I have a vertex colored model (1) and I'm using Cells v1.2 to generate a hollow voxel model of my Object.(2)

I want to change the object color of every instance/voxel according to the underlying vertex color or UV map. As shown in picture (4).

enter image description here

In this stackexchange post the instance inherits the color from the emitting vertex. Tricky part is that in my model the instances/voxels don't line up with the underlying vertices of the original model. Seen in picture (3).

How do I find the nearest color for every instance? The result should consist of separate objects with its own object color. I want to export every individual color as an .stl file.

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