From: Rune Thomas Kidmose (
Date: Wed Mar 21 2018 - 07:39:19 CDT


Is there a way to reduce the thickness of wire frames on an isosurface when rendering with TachyonL?

I have tried setting the "size" parameter to sub 1 via the below tcl command.

mol modstyle 0 1 Isosurface 0.053959 0 0 1 1 0.3

however it seems 1 is the lowest it can go.

My problem is when I want to render figures using TachyonL, of close-up views of density displayed as a wire frame isosurface. The lowest "size" setting of the wire frame, still generates far to thick wire frames to enable viewing the model inside the density.

You can see an example image of the problem below (was not sure I could attach files to this mail)

The above image is rendered with TachyonL-optix, but the same applies to -OSPRay

This is how the model and isosurface looks in the display window pre-rendering:

And this is the results using "just" tachyon rendering:

where there is no problem with the wire frame thickness.

As I would really like to use TachyonL-optix, how can I solve this problem when rendering this kind of closeups of wire frame isosurfaces?