Control vray sun/sky ratio

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

Hi guys,
I used to setup my scenes to get soft sun by making a sun/sky system and then having a sky map instanced and put in material slot and vray environment. Then I would make sky specify the sun node manually so I can control it and make sun multiplier somewhere like 0.01 and sky 1.0 so I get much more sky in and soft sun so it doesn’t burn the areas it hits. Using reinhard with low burn values never gave me what I wanted.

Now I’ve tried this all with 3. and it doesn’t work. Everything looks the same no matter what I try. I put very low multiplier values in vraysky and I can see it change in material editor form white to actual sky colours but when I hit render the scene remains the same. Also tried to reduce indirect horiz illum values no change.

And yes I tried to reinstance it to my environment maps since sometimes the instance connection gets broken.

2

leave everything at default and use your camera to expose like you want. If you want softer shadows increase the size of the sun

3

vray sky (default, controlled by active sun) in dome light. dome light power adjusts sky to sun ratio.

4

Don’t you guys get burned areas with default? Sometimes I like that, but mostly my clients hate that. I mean it’s perfectly accurate to the actual camera behaviour but mostly I need my sun to come through the white curtains and that you can see every detail on the curtains if you know what I mean. Also I need a white or light grey carpet to keep its details and remain white even when hit by sun - so I don’t have to make it grey. Oh and I my whites are usually around 100rgb.

5

even with whites around 100rgb you need to reduce highlights somewere. my prefered way to do that is VFB.

6

You can set sky intensity to 0 and it still shows up as if it’s 1? that’s a bug that I dont get here, changing the values separately works fine. upload a test scene where it happens.

7

So I can get a light select for each source, I put my vray sky map into a dome light. It’ll still be driven by the vray sun settings but I can get it as an individual pass and I get the domelight multiplier as a second intensity control.

8

Separating them works here as well. Although still a pain to simulate grey overcast London. We need VraySky UK version.

9

heh. here is how I do verified views is London where you need to match often like 20 photos with variable sunlight:
fully desaturated vray sky in domelight
vray sun overriden to white
instanced vraysky desaturated a bit in refl env override
two light select elements for control of color and intensity in post.

10

I see, must have a play with light select again. Think I gave up with it because there was no GI

11

There is a ground albelo (+blend angle) option in the latest version of V-Ray which might help to get the sky more UK-ish. :stuck_out_tongue:

12

LightSelect elements contain the GI contribution when rendering on the GPU.