Corrupted file making every kind of surface not watertight

Rhino Rhino for Windows
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1

Hello, I have a problem with a Rh7 file that exports all surfaces incorrectly.
I am working on a piece of land with the reference of a 3D mapping mesh made from aerial photographs, for scale 3D printing.
The problem is that when I export the file in mesh formats (OBJ or STL) it is not tight and all the surface details are flattened like a staircase.
I took a lot of different approaches to fix it, mesh repair options, subd options. I also modeled the terrain from contours in RH7 and GH, and modeled it from scratch with subd but the problem remains.

I also noticed that the display in this file is strange, and even a 3-point flat surface looks like a triangular textured mesh.

I attached some photos of the problem, because I don’t know what is going on, maybe it’s a problem related to the original drone file or scaling.

I really need to fix this problem, thanks in advance!

closed polysurface terrain
closed polysurface terrain1920×1138 219 KB

Planar surface
Planar surface1600×1200 136 KB

Land in cura
Land in cura1334×927 80.2 KB

2

You seem to be far from the origin.

1 Like
3

As Martin suggested, the fix is to move your objects from where they are to the origin in Rhino, then export.

Computers have a limited amount of precision that they can handle, and when objects get very far from the origin, rounding errors cause problems like you’re seeing.

4

I see, that was the problem.
Thanks for the advice! I was really going crazy with my attempts of solution.