I want to make all of boxes mesh. Form is wrapping around boxessmooth.gh (6.7 MB)
Two good options would be to shrink wrap using Kangaroo or use the Dendro plugin (attached is an example using Dendro).
There are a couple of issues with your file that will make things more difficult.
First, the scale you are using is massive. You model is several kilometers wide in the model space. I worked around this by scaling it down x1000 and back up again but you should just use a smaller scale if possible.
Second issue is that you have over 3000 individual brep bodies. You may want to bake out, do a boolean union operation and bring it back in to Grasshopper to make things run smoother.
Thank you. You are very nice!