Vray 3.3 Material Subdivs greyed out?

V-Ray for 3ds Max V-Ray for 3ds Max :: General
1

In Vray 3.3 the subdivs box is greyed out for reflection and refraction for Vray Materials. Is there a new override?
Thanks!

2

Yes there is a new override as well as a new workflow

A LOT has happened with 3.3 and I suggest you checkout Lele’s cheatsheet: http://forums.chaosgroup.com/showthread.php?85716-Cheatsheet-How-to-get-a-Cleaner-image-with-SP3

…and come to the forum more often (maybe while rendering), there’s a lot of valuable info floating all over the place

The SHORT ANSWER to your question:
In VRay render settings under the “Global DMC” rollout, tick “Use local subdivs” (but that’s the old way of doing things)

3

Thanks Morne,
Looks interesting. It appears after reading the forum post Lele’s best practises is for general noise at a trade off for render time. I wonder how it works for the pesky isolated glossy reflection noise or sun shadow noise.
I will need to test this out with our animations.

4

I guess you could use the subdivs multiplier (VRay properties). However, for the sun shadow noise, no idea …

5

I’ll try out the new workflow but I suspect I will still need to do minor tweaks to the subdivs of the reflection/refraction material properties when using glossy effects and sun subdivs if I make the sun softer (It’s under the Sun parameters)

6

It’s the same noise as anything else… why would those be special?

Best regards,
Vlado

7

Hi Vlado,
I’m specifically talking about glossy reflection/refraction noise and soft sun shadows. These both tend to cause more noise than regular diffuse materials and a regular sun.

8

The adaptive image sampler should be able to clear these up just fine.

Best regards,
Vlado

9

Yes it usually does. I tend to undersample the scene and adjust certain elements to allow for faster renders. This may be the old way but I need to keep our render times to 15min a frame for animation.
But that being said I will try what Lele recommends for IR/LC and compare the end results / time.

10

Well, if you need the manual adjustments, you can always turn the local subdivs option on and proceed as before :slight_smile:

Best regards,
Vlado