Help improving render times FStorm vs Vray

[Miguel1900]

[SOLVED]

Hello all,

I currently am a Vray user moving to FStorm, so I usually convert my models and scenes to FStorm to render them, and this will help me also to understand how FStorm material work themself to start learning slowly.

Well, I have done several test, but this time with two free scenes from the internet, so you can download them and play with:
Scene 1: https://www.cgtrader.com/free-3d-mod...ior-young-room
Scene 2: https://www.cgtrader.com/free-3d-mod...pe-living-room

About the tests (appart of material conversion, which sometimes varies a little, or more than a little), I have similar results, with the "something" FStorm has which makes me to prefer its appearance over Vray one. But time are different. Sometimes (I think in simple scenes), FStorm is much more faster than Vray; 200%, but in complex (I think), it is sometimes 200% slower than Vray. That means that the performance of FStorm can be 400% slower compared with itself!

So I am here sharing with you the scenes and searching for existential replies and tests. What's wrong? How can it be improved? Do you obtain the same results? Are there, maybe, certain material very slow to render?

Let's play!


Results:

- Scene 1:
Vray: 23min
FStorm: 10min, 7000 passes, 100% noise free area

- Scene 2:
Vray: 1hr,15min (Same settings than Scene 1)
FStorm noisy image: same time, 13000 samples
FStorm, decent noise: 3hr, 30000 samples


EDITED:
I have an i7 3770 (old cpu) which nowadays could cost 250$, and a GTX 1060 Pascal (new gpu) which currently costs 290$.


Thank you and best regards!

[paoloverona]

I don't want to register to cgtrader, have you got a dropbox account where to download the scenes?. Which hardware have you got?, you can't strictly compare two engine that uses different hardware for making the same job (render), that means that if you have a double xeon processor and a single old gtx card, it's quite sure that Vray wi'll result faster than FStorm.
I have and i7 5820k overclocked 32Gb ram + quadro5000 for display and a gtx980ti for render, and in all my tests FStorm was really lot faster than Vray.
Another important thing is how deep you know Vray (I know very poor): knowing it in a good way, you can optimize its parameters and short down significantly the render time

[Miguel1900]

Thank you for replying. Of course I understand you, but as I told, it depends. I am not saying that FStorm y slower than Vray; I am saying that on the first scene FStorm is faster, and on the second, it's slower, so it doesn't sound like a hardware issue I think. In fact, I have an i7 3770 (old cpu) which nowadays could cost 250$, and a GTX 1060 Pascal (new gpu) which costs 290$.

I have uploaded the file to my dropbox, so please, if you can try I will be pleased (I think I have saved the file with my render settings at a lower resolution of 1280 to take less time, so you only need to press render button): https://www.dropbox.com/s/dda1v0d164...scene.rar?dl=0

Thank you!

[Karba]

I checked the scene. Please open light lister after conversion. There will be several light sources with huge power. Set a reasonable power for them. And set light samples to 16. Then it should render properly.

[Miguel1900]

I checked the scene. Please open light lister after conversion. There will be several light sources with huge power. Set a reasonable power for them. And set light samples to 16. Then it should render properly.

I can confirm it! Thank you very much Karba. The problem was those "IES" lights, which had absurd values of 10000000000, however it seems to be a conversion problem, as those lights always take that value, even if its original Vray intensity value was 2222 or just 1. But you said that you will add power conversion for a better light translation, so no problem then!

Thank you and best regards