ipr in viewport

V-Ray V-Ray for 3ds Max General
1

hi!
there is a big difference in performance (moving and navigating) while working in the vfb compared to in the viewport of 3ds max
while enabling ipr in viewport and moving just a simple sphere, its not really realtime but very laggy.
is this a max issue? Will this be better in the future? Or there wont be any updates for that?

thank you for your time

2

How big is your monitor resolution?

3

I have the opposite, while both are slow and laggy, doesn’t matter the resolution 2K or 4K, the viewport IPR is a tiny bit more responsive: https://www.youtube.com/watch?v=ofAI48iFp6U

4

I have a 2K !

5

Dude, I also have this issue in the IPR. You are on a beast of a cpu! I am on a old threadripper. Could it be related to threadrippers?

6

Yeah I have this issue on all my threadrippers (3970X, 3990X, 9880X)

7

it has to be! 3970x here

8

Have you guys tried updating your chipset drivers? There’s another thread about the same issue where users claim updating the chipset drivers helped. Also, is the slow IPR or Viewport IPR (ActiveShade) happening with Arnold?

And, as I’ve mentioned before, you could lower the viewport IPR resolution (default = 1) via MaxScript:
renderers.current.ipr_viewport_resolution=0.5