2

I have this .stl that I downloaded and I need to create a solid of this 3D. However, if I click "Make solid", it doesn't work.

How can I do? I think the problem is the black layer but I don't know how to resolve.

Before make solid:

Screenshot of Meshmixer - before make solid

After make solid:

Screenshot of Meshmixer - after make solid

I need to make solid and the black layer is deleted when I do it.

https://drive.google.com/file/d/1g-YaF1k_X5FU1Y-SgWiGCXC4k_nADohk/view?usp=sharing

PS: The other object are different item, so if they are there or not is the same

Inuraghe
  • 165
  • 9
  • Hi and welcome. We *may* require more information, please [edit] and add more details. – Greenonline Jun 19 '22 at 13:39
  • Other? I have download the file, I don't much more but I need to make solid and the black layer is deleted when I do it – Inuraghe Jun 19 '22 at 14:46
  • 1
    Do you have a link to where you downloaded the `.stl` file from? If we can reproduce the issue, then maybe a solution can be found. Please [edit] and add the link to your answer (don't add info in the comments). – Greenonline Jun 19 '22 at 17:44
  • 2
    Your object browser shows three objects in the first image, only one in the second. Are the missing pieces those of the other two items in the first image? – fred_dot_u Jun 19 '22 at 18:08
  • The other two objects are different item – Inuraghe Jun 22 '22 at 07:01

1 Answers1

1

Make solid requires an enclosed volume

To run the make solid operation, the selected parts need to enclose a volume. In case the volume is not fully enclosed, the program tries to solve a solution that closes the open surface.

The black layer is most likely failing to compute because its normals are flipped. This means it does not enclose a surface, it excludes anything between the surfaces from being inside the body defined by it - it is everything but. This is solved as "this surface does not enclose anything, so I cut it out" but for where it creates a valid solution in the area of the white surface before the operation.

This leaves you with the white retained part after the operation.

To fix this is an in-depth project

Fixing such errors is quite involved. You will need to do the following steps, depending on your program to alter:

  • flip the surfaces so that it shows outside
  • make sure that the body is closed, possibly by adding missing surfaces
Trish
  • 21,174
  • 10
  • 48
  • 97