inconsistent Redshift Toon line thickness

[itsmikem]

Hi. I'm seeing inconsistent line thickness between external and internal lines. I have them both set at thickness: 6 in the contour node but the external lines are thinner, as if they're drawn behind the geometry. Am I missing a setting?

[Dr. Sassi]

Hi itsmikem,

Please have a look at the file below.
CV4_2025_drs_25_RStl_01.c4d

Are the image and the render result from the file the same?

In the file one Tube uses a material with only the Internal Contour.

If not, please share the project file with just the Material and perhaps a Tube object here as a c4d file. 1MB max.
(If bigger, Dropbox, Wetransfer, Google, Adobe, or Apple as cloud-service only [security-based], uploaded as is not compressed, and the full URL pasted here, not HTML wrapper, thank you).

Cheers

[itsmikem]

Thank you for replying, Dr. Sassi, I appreciate it. The image and render result are the same. Here's another example of two intersecting platonics. I have both the internal and external lines set to 10 in the contour node. As you can see, the internal lines are rendered doubly thick as the external lines. I'm not sure what's causing the disparity in thickness.

[itsmikem]

[SOLVED] Dr. Sassi, I have found in the documentation under The Node Editor | Redshift Nodes | Redshift Utility Nodes | Surface Nodes | Contour:
"it is confined to the inner bounds of an object. Technically, a contour can never render outside of an object's silhouette but a workaround can be used to achieve a similar visual effect as described in the Contour Behavior section below, Breaking Boundaries." Essentially, I have to add a material with contours onto something in the background. The intersecting lines then render the "missing half" of the line because the lines are only rendered within the geometry. In my case, I put the Toon material on a ground plane, and it then rendered as I wanted it to look.

[Dr. Sassi]

Thanks for the reply, itsmikem.

If an extra object works for you, as it sets some rules*, perfect!

(* Essentially, this requires all objects in a scene to use contours…)

My best wishes for your project!