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Can't spot the difference in MR photons
show user profile  Davious
I was looking for a way to speed up the MR renders of my dreadnought. GI and FG wre initially set to 1000 each, so I dropped that to 500. Render times approx halved, as you might expect.

I was getting about 1.5 min renders at this point. I tried then reducing the photons per light from 10000 to 5000, and reduced my time again, with no noticable difference in quality.

so after some experimenting I dropped photons down to 50 , (Fifty) er light from the standard value of 10000.

Result of a 19 second render, no difference that I can see on the renders.

Question : emmm... why ? and why bother ever with 10000 photons? there must be that many for a reason. Thanks


" Difficult, yes. Impossible , no..."
read 567 times
4/20/2008 6:03:19 PM (last edit: 4/20/2008 6:03:19 PM)
show user profile  horizon
Do you have really soft shadows, almost pure black spots, any reflective and refractive materials?
I don't use MR and even in Vray I still have no idea how some things work, but I noticed some settings only get noticeable drop in quality in some of those areas I mentioned.



read 564 times
4/20/2008 6:09:29 PM (last edit: 4/20/2008 6:09:29 PM)
show user profile  TimTamFin
Turn off GI and render. Do you notice any difference on the outcome ? I'm pretty sure that FG is doing all the work in your case.

EDIT: Then render one with GI only.

Rgds,
Timo

read 524 times
4/21/2008 6:04:10 AM (last edit: 4/21/2008 6:12:08 AM)
show user profile  Davious
Horizon

Thanks for the reply, the image is that of the dreadnought I'm working on, two lights, one direct for the sun and a skylight with a hdr map.

Tim Tam Fin,

thanks for the checklist, GI seems to do sweet FA on the render. FG is doing it all as you said, maybe this will change when I start adding materials.

thanks for the feedback, always appreciated ;)

" Difficult, yes. Impossible , no..."
read 495 times
4/21/2008 2:53:22 PM (last edit: 4/21/2008 2:53:22 PM)
show user profile  Poopsmith
I've noticed similar results. Alot of times it depends on your scene. ie if your doing an interior scene, it needs higher quality to calculate the bounces in the room from the outside light. But when lighting directly, there is virtually no difference.
3d 2d digital artist special effects poopsmith

read 490 times
4/21/2008 2:56:05 PM (last edit: 4/21/2008 2:56:05 PM)
show user profile  horizon
Just curious, whats final gather (assuming thats what FG is)? Any vray equivalents? Never used mr


read 479 times
4/21/2008 4:58:45 PM (last edit: 4/21/2008 4:58:45 PM)
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