refractive+round edges+curtter = huge slowdown

[v.p.vlasenko]

Hi,
setup - "glass" object (green on screenshot), "liquid" object intersecting "glass" with round edge map in bump slot (blue) to add capillarity effect, copy of "glass" with push modifier with a small negative value and a cutter material applied to match glass walls, included "liquid" only (red).


Render time to 1% noise
1. glass+liquid - 21s
2. glass+liquid+round - 36s, 1.7 times slower
3. glass+liquid+cutter - 49s, 2,33 times slower. This is a question by itself - using cutter material gives a significant slowdown.
4. glass+liquid+round+cutter - 249s, 11,8 times slower???

3 - is it expected behavior with cutter and such slowdown? I encountered a noticeable slowdown many times in absolutely different scenes + a bug when a cut object was visible through all scene geometry despite obstacles between it and the camera (but that's another story and I'll report it next time when/if I catch it).

4 looks like a bug. 

[Avi]

Hi,

I was able to repro this slowdown and have logged this in our system for our devs to review. Meanwhile, if you can attach your scene file, your system hardware specs, Corona version and 3ds Max version you used for the test and provide some screenshots. That will help us with our investigation of the issue.

(Report ID=CMAX-1479)

[v.p.vlasenko]

I don't have scene, it was created just to show the problem. Just 3 cylinders.
As for specs - intel 7980xe, 128Gb, Windows 10, 3dsmax 2025 and latest daily build at the moment of bug reporting.

[Avi]

Thanks for the info. Updated the report with this additional information.