Just realised that I can’t use the new slicer material with Mtl override enabled for ‘clay’ renders.
Can you pleasse add an override check box for the slicer materials (as you have done for glass and light materials?)
Thanks!
Good news is already requested and we’ve filed it away for consideration 
https://forum.corona-renderer.com/ Material override setting #msg198419
Even better, it’s on tentative roadmap for V9: Trello
Woohoo! I was checking for slicer on the roadmap, so totally missed it
Excellent news!