Question about progressive

[Nicinus]

I have a feeling this is a stupid question, but I gotta ask. Why do my prepasses render with buckets even though I've set my image sampler to progressive?

[Nicinus]

Well, I knew it was a stupid question but I don't get it, shouldn't using BF+BF with a progressive sampler eliminate the need for buckets even in the prepasses?

[yavor.rubenov]

Hello,

If you are using progressive and BF+BF and still see bucket prepasses - maybe you have some prepass based SSS2 materials or VRayMtls with interpolated reflection/refraction. V-Ray should write a line in the log file for every such material - that should help find it.

Best regards,
Yavor

[Nicinus]

Thanks, at least that confirms that I shouldn't really see any so that's good to know. Will try to identify the culprit although I'm pretty sure i don't have any SSS2 in this scene.

[Nicinus]

So I have not been able to identify the material, but the scene renders without buckets if I use an override clay material.

I can not see any lines in the log files that would give any hint, unless standard materials are the issue? I usually check the interpolate option when converting imported scenes from Revit. I do have the following green warnings:

Camera matrix is not orthonormal and 'Max-compatible ShadeContext' is ON
Standard materials and lights may shade incorrectly

But I feel I always have these two, what is the first one about?

[Nicinus]

Looked into this a little closer and unchecked 'Shade context in camera space' (what does this do?) and both warning messages disappeared.

However, I still get buckets in the prepass. Can it have something to do with vrmesh? It also says it found 306 opaque, 272 double-sided instances?

[Nicinus]

Hello,

If you are using progressive and BF+BF and still see bucket prepasses - maybe you have some prepass based SSS2 materials or VRayMtls with interpolated reflection/refraction. V-Ray should write a line in the log file for every such material - that should help find it.

Best regards,
Yavor

You were right, there was indeed an SSS2 material in a lamp I purchased in a collection, I never noticed. I couldn't see anything about it in the log though? Should I have more than verbose level 3?

[yavor.rubenov]

The SSS2 material issues the message in the log only if the prepass id is not 0. I'll make a note in our system about this - it should probably write the message even if the prepass id is 0.

Best regards,
Yavor

[M.Max]

I am facing the exact same problem and the prepass as it take huge amount of time (estimated time is + 13 hours ) Is there any way to find All SSS2 materials in the scene quickly ?! (script for example )
Best regards,

[Vizioen]

I am facing the exact same problem and the prepass as it take huge amount of time (estimated time is + 13 hours ) Is there any way to find All SSS2 materials in the scene quickly ?! (script for example )
Best regards,

Modifier modifier Zorb script can do this easily. http://www.scriptspot.com/3ds-max/sc...-modifier-zorb
Also Mission Control if you have access to the beta: http://reformstudios.com/mission-control-for-3ds-max/

[glorybound]

I am surprised how bad of a resource hog sss2 is. I had a scene that just sat there, without budging, because a candle that was using it.

I am facing the exact same problem and the prepass as it take huge amount of time (estimated time is + 13 hours ) Is there any way to find All SSS2 materials in the scene quickly ?! (script for example )
Best regards,

[M.Max]

Modifier modifier Zorb script can do this easily. http://www.scriptspot.com/3ds-max/sc...-modifier-zorb
Also Mission Control if you have access to the beta: http://reformstudios.com/mission-control-for-3ds-max/

Thanks man ! I didn't know Zorb script will help here .will give it a try next time ,,for this time I went the old school way isolat>test>isolat > test ....etc and finally I find it ! deleted it and the render went smooth again =D
Motion Control looks promising I have been following the development on CGTalk forum, but I totally forget about it.I am waiting for the official release to try .
Thanks again

[vlado]

Well, that's why I wanted the SSS2 material to automatically switch to raytraced mode in newer builds, in this way there are no problems like that... but someone complained, of course I think we will revert back to raytraced SSS2 by default. It makes things so much easier.

Best regards,
Vlado