How to change Backface color

Rhino Developer
1

Hi everyone!

I want to apply different color on surface or mesh.(Display - Object settings - Color Backfaces - Backface color)
There were few topics use Backdiffuse. I read that topics and tried to apply but it’s hard to me.
And I have no idea the Backdiffuse is correct solution…
So I got a few question.

  1. How to change Backface color using rhinoscript or Rhino common sdk?
  2. Can I use Backdiffuse in Rhino 5 windows? Now I using Rhino 5 in windows.
  3. Is there any site or doc which explain how to use Rhino common by python?

Thank you.
Jinwook Kim.

2

Hi @jinwook_Kim,

Are you trying to dynamically draw objects with a different back face material color? Or are you trying to change the back face material color of an existing advanced display mode, as see in Options > View > Display Modes?

Yes.

You might start here:

Rhino - Rhino.Python Guides

– Dale

3

Sorry to necrodive here, but, R7 and R8 showing backfaces as a colour only works on open geometry i make, not any closed geometry?

Have a missed an obvious way to detect flipped normals?
(visually i mean, like with a backface setting, not the dir command) so our team can outdetect these

testfile.3dm (6.1 MB)

4

The Dir command is useful.

– Dale

5

Hi Dale thanks but we import several hundred to thousands of customer supplied parts and not always easy to see which ones might be buggy till we get to slicing, i dont want o have to run a command on every part, I’d like a view port to show it like it does with backfaces colours to trigger a warnign to staff.