Hi,
I tried applying a simple checker displacement to a primitive box, but I am getting a very bad result. I expected clean extrusions.
Increasing quality seems to be very inefficient, as it subdivides the mesh a lot more but does not fix the zig zag issue on the faces.
This simple model is extremely heavy… and it does not even look right. A side from the face crenelation there is also glitches at the edges.
What I am doing wrong?
Hello - I guess the texture being black/white with no transitions is going to make that difficult to do cleanly . A slightly blurred checker will allow for some transition at the edges as is, vertices must either be up or down and they may not fall exactly on the checker edges.
-Pascal
Hi Pascal, any texture I try seems to be very bad, it is not unique to checker. Even high quality ones. Blender, a free software does a much better job at displacing…
Even Vray displacement for Rhino seems to be doing a better job:
This would be Rhino displacement:
Vray Displacement
Edit: Practically displacement in Rhino is unusable to me given its output quality and output mesh size (millions of polygons)
Hello - can you post that texture or send it to me? Seems like a good test case.
-Pascal
Rhino does a decent job with this map if the initial quality is set ‘extremely high’, which is tough to use. I also set the white point to .5 to keep the displacement from getting too tall.
In any case it may pay to use a displacement channel in a physically based material (V7) rather than Displacement, then Cycles does the work. You do need a pretty fine render mesh to make it look good but it is a lot faster than displacement.
-Pascal
Thanks for checking Pascal. I still have not made the jump to Rhino 7. The other problem is I need to apply the displacement to the geometry to export the model and pass it on to other people who will visualize it.
I was hoping to use displacement as a modelling tool rather than a rendering tool.
Yeah, you can do that but you’ll need to set the initial quality to Extremely High, I think, with a complex map like this, and wait for it to finish. I’d compress the range from 0-.5 as well - it is hard to make changes because it takes so long to regenerate at extremely high, but the results are not bad, I think. I have been testing in 7 , which is different (better than) than 6 I think in this area.
Also, might want to verify that Vray is actually displacing the underlying mesh as cleanly as they render it.
-Pascal
