Rendering performance issue - Corona Bitmap vs Max Bitmap

[Fluss]

By the way, have you tried rendering:
-locally on master with Cbitmap
-locally on master with max bitmap
-locally on slave with Cbitmap
-locally on slave with max bitmap?

What I mean is if there is any difference between the Cbitmap and max bitmap depending on network rendering on/off.

All tests shown above are made locally (with no network involved in rendering) with assets stored on network drive. Bringing assets back locally did not changed anything tho.

[dfcorona]

I just tried the recommendation of using Corona bitmap for hdri lighting the scene since it was so much faster above. But for some reason hdri with Corona bitmap was slower.

3dsmax bitmap: 13min34sec

Corona bitmap: 18min22sec

Am I doing something wrong?

[maru]

@dfcorona @Fluss
One more thing:
Please open the development/experimental stuff rollout - https://coronarenderer.freshdesk.com/support/solutions/articles/12000021288
Then change "Enviro sampler" from "NormalDependent" to "Fast".
Then redo your tests.
What times are you getting for Corona Bitmap and Max Bitmap?

[maru]

Ok, I did some tests. If you guys have time, you can repeat them to see if you get similar results:

Env NormalDepend (default):
CBitmap - 00:35 min
MaxBitmap - 1:03 min

Env Fast:
CBitmap: 00:40 min
MaxBitmap: 00:58 min

[dfcorona]

Max Bitmap
Env NormalDepend: 13min 58sec
Fast: 13min 53sec

Corona Bitmap
Env NormalDepend: 13min 36sec
Fast: 13min 49sec

Doesn't seem to really help, Makes corona Bitmap worse.  Seeing results from Fluss I thought I was going to cut my render down significantly with Corona Bitmap.

[dfcorona]

Did one more test

Corona Bitmap
Env NormalDepend with New Light Solver: 15min 08sec

[Fluss]

Here are my tests :

Env NormalDepend (default):
CBitmap - 00:49 min
MaxBitmap - 01:07 min

Env Fast:
CBitmap: 00:48 min
MaxBitmap: 01:06 min

[ossiantove]

Question: is the render fast in the beginning and slows down after some time? By the looks of the statistics from your screenshots, there is a huge gap between rays/s total and rays/s actual, which could be the case if the render starts at a very high performance level and then drops. That is a problem I have with a new workstation:

https://forum.corona-renderer.com/index.php?topic=20453.0

I was thinking ot could be the same issue, although I have no solution yet.