Overlooking the error (as always)

Hi @Marcel_Rijsmus maybe try:

  • hide levels in your 3D view
  • set your Z origin point for RayRounce node to start just a bit above at element.

    I add the generated model line of distance in your filetest_v01.rvt (984 KB)

Cheers

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Thank you all for your contributions, i had a blast solving this.

I ended up with the required result by adding a temporary floor way above the building so i had no misses with my Raybounce.
Run this graph
distanceTo2.dyn (36.7 KB)
And delete the temp. floor afterwards

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