Can't control hair thickness by vertex paint...

Using a gradient ramp to control hair thickness is fine, as you can see in the first image by comparing the render to the viewport.

But when I try to use vertex paint to control thickness, as you can see in the second image, the render does not look like the viewport.

I am using the latest build of Ornatrix (15953),

If you want to test this in the Max file, it is set up initially to use a gradient ramp. Then to test the issue with vertex paint:

  1. Select ‘geo_prt_featherL_002’
  2. In the top modifier ‘Ox Render Settings’, clear the 'Existing ‘Thickness Map’ (right click on the map → ‘Clear’).
  3. Click on the ‘Assign Map’ button (green button), select ‘Channel 4’, then click on ‘Assign’.


    coronaHairThicknessBug.max (796 KB)