Optimising scenes in Next

[leehumphries]

Can you upload the file ? or wetransfer ?

[notamondayfan]

I'll see what I can do, but need to be careful as it's a live project.

Also, after some testing, by ticking "Use local subdivs", I get better render times, and no noticeable different in noise in certain scenes,

[kosso_olli]

I'll see what I can do, but need to be careful as it's a live project.

Also, after some testing, by ticking "Use local subdivs", I get better render times, and no noticeable different in noise in certain scenes,

I suggest this option to be removed in future releases. It does more harm then good. It may work on some simple corner cases, but on the majority of scenes it is likely to perform worse.

[glorybound]

IDK, that automates V-Ray now and reverts it back to the old days, doesn't it? It'll smartly assign the subdivs per object internally.

[kosso_olli]

IDK, that automates V-Ray now and reverts it back to the old days, doesn't it? It'll smartly assign the subdivs per object internally.

Yes, V-Ray does this on it's own these days.

[notamondayfan]

Maybe I'm just pushing what I do too far in terms of materials and lighting, and expecting too much from my hardware.

[notamondayfan]

I had some more time to do some digging, and it appears that the vrayextratex was causing almost double the render times, which I've never really experienced in the past. I mainly use the extratex for amblient occulsion (vray dirt), and never really noticed any significant render times. So I was quite surprised when I removed this to find render times drop massivly.

I now either don't use AO, or just render another pass by itself.

Just thought I'd update in case anyone needed that pointer

[yavor.rubenov]

Hello,

Could you share a screenshot of the V-Ray Dirt texture settings you use?

Best regards,
Yavor

[notamondayfan]

Hi Yavor, see the attachment...

Cheers

[yavor.rubenov]

Hmm nothing really pops up. Maybe the distance of 1000 is a bit big but I doubt it will cause any noticeable difference in render time..

[notamondayfan]

1000 just gives a nice fall off on interiors (I work in mm) so adjusting this wouldn't really be ideal.

[anthonyh]

We sometimes need an AO Dirt pass so I wanted to have a go. VrayDirt (3.6) has a default radius of 10. A quick test at radius 10 rendered in 24 seconds vs radius 1000 in 55 seconds, about 2x as slow for me which seems to be what`s being said.
Turning off Dirt and using a radius of 1000 in Vray GI Ambient occlusion was 26 secs and looked much more `even` versus much heavier black shadows with VrayDirt left at default black/white. Changing the VrayDirt occluded black to a more mid grey 100 not only sped up rendering to 38 secs but also looks much closer to GI AO.
At least on the crappy scene I tested, although given the state of some of my scenes all data should be taken with a pinch of salt.