Polysurface face invisible from one side, visible from the other

Rhino Rhino for Windows
1

Hi.

Funny bug

looks like there is a hole (which should be there created with makehole command)
image

from the other side there is not
image

3D_podchody_levare_zavod.3dm (1.2 MB)

2

Hi Ivan -
It looks like you are running into some tolerance issues with this one.
To solve this: extract the inside wall that has the shading issue and delete it.
You see that the floor and the bottom surface of the opening are two separate surface.

image
image770×422 74.4 KB

Select the entire object and run MergeAllFaces. You will see that other co-planar surfaces are merged but not those:

image
image770×422 74.9 KB

Extract these two and join them. Then run MergeAllFaces again. This will now produce one single object:

image
image770×422 20.4 KB

When you join that with the rest of the object, you can use Cap to make a closed polysurface that doesn’t have shading issues.
-wim

3

thanks i have resolved it already :slight_smile: i just wanted to point it out.

it is definately related to far from origin though

4

Thanks, Ivan.

If you happen to have the objects as they were before you used the MakeHole command, we could try and figure out what goes on.
-wim