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Context: How to convert any model into lego bricks using geometry node?

I want to creat lego-like points on the surface of a monkey, but there are too many points inside of the monkey. I don't know how to delete points inside of the monkey. This is a problem because my project invovles millions of points.

What I tried:

  1. Join geometry between the true monkey and lego monkey.
  2. Union between the true monkey and lego monkey.

I know there is a delete gemotry node but I don't know how to specify points inside of the geometry.

My file: https://blend-exchange.com/b/0bbqOWNO

enter image description here

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  • $\begingroup$ please check an answer as correct (click on checkmark left to the answer) if it helped you $\endgroup$
    – Chris
    Jan 21, 2022 at 8:45

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This is my attempt to solve this problem. Here you will get exactly one layer, using shape from a Remesh modifier:

enter image description here

I have to split GN into parts because I haven't found merge by distance function in GN. So that, I had to use a Weld modifier.

The issue that the Remesh doesn't use static values for the block size, so that solution is not perfect.

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