Adaptive Lights artefacts

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

Hi we are strugling with theese strange artefacts when using Adaptive Lights. Using light Tree kind of fix it but partialy, only Full Lights Evaluation wirks as expected, but in interior with many light its really slow to render :frowning:

This error is visible only in VrayLighting pass. Check this “pixelated” effect. (gif doesnt work here?)

bug.gif
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Any suggestions?
Thanks​​​

2

Are you using a domelight in your scene? Can you try do disable Adaptive Dome on that?

3

Yes adaptive dome light is present, but its an interior scene. I’ll test it without adaptive domelight.

4

Any objects with disabled shadows in the scene?

5

Nope but invisible for camera and it seems those artefacts are around them.

6

Can you pack the scene and send it over? - https://support.chaos.com/hc/en-us/requests/new

7

I will try but its not that easy as it look :slight_smile:

8

Hi I just send you scene file. I just want to point out few things.

- I tried to clean the scene as much as possible from our stuff, but maybe there could be something I miss.
- There were some object with shadow casting of but deleting them doesnt work.
- There is no skydome.
- Its visible mainly in VrayLighting pass but it propagates into beauty sometime less sometimes more.
- When rendered on one machine those artefacts are static, othervise they are moving.
- Using Ambient Light greatly boosts this effect but without it its still there.

9

I am pretty sure this is caused by the domelight set to adaptive dome. Did you try to disable adaptive dome feature?

10

I thought there is dome light but there is not, so definitely its not because of adaptive dome light :frowning:

11

Do you have any lights that touch each other? We have seen numerous issues there, especially if the lights are actually coplanar, but sometimes just from some intersection.

12

I don’t see artifacts without the ambient light with the scene you sent, but indeed it’s a bug.

As a workaround you can either remove the ambient light or switch to “Full lights evaluation” in Render Setup/ V-Ray/ Global switches (Advanced).

13

Fixed (thanks to Vlado :slight_smile: ) here is a stable build that you can use - Chaos

14

Wow that was fast :slight_smile: A want to fix all our issues like this :smile: Thanks