Phong mat with wireframe : backface

Beginners
1

Hello there.
I’m using a phong mat with topology wireframe on, doing vertex displacement on a plane.
I just found out that the backface could only be rendered with the tesselated wireframe mode.
Is there a way to get that with the topology wireframe?
Tried the backface culling options, did not work !

Thanks,
S.

2

It should work, can you post an example. toe of your issue?

3

Yes of course.
Here it is :slight_smile: GridDisp.tox (2.8 KB)

4

The issue is that ‘lines’ don’t really have faces, so currently we aren’t flipping the normals when the source surfaces are facing away from the camera, the way we do with a regular polgon. The OpenGL mode is a rasterization trick, which is why that one still works.
So they are still there, they just arn’t getting lit. You can use a Constant MAT instead to make sure they get color though.

5

Or alternatively upping the Constant or Emit color on the Phong MAT might also make it visible?

6

Havent thought about this :roll_eyes:
Thank you guys !!