Issue with disk spread

[Xaia]

Hi there,

I am having some weird problems with disk light. Light does not affect the volumes if spread is lower than 1 and greater than 0.6. When its lower than 0.6 this happens:

mtoa: 3.1.1

Cheers

Dawid

[Stephen.Blair]

Sorry, I do not repro this with the latest MtoA. Can you post a repro (a scene or ass file that reproduces the issue)

[Xaia]

Attached ass and ma files

diskspreadproblem.ass

diskspreadproblem.zip

[Xaia]

We just installed newest Arnold and have the same problem on every single machine in the office.

[Stephen.Blair]

Who is we? Reply to support if you must.

[Stephen.Blair]

Why do you disable Normalize?

[Xaia]

old habits

[Stephen.Blair]

Ok.

This problem started in Arnold 5.1.0.0 (released in April 2018) and I've logged a ticket with the dev team.

Thanks for reporting

[Xaia]

Just wanted to let you know that same problem occurs with maya spotlight with these settings:

[richard]

Hello

I would like to rewake this issue.

@Stephen Blair

It happens when I use "disk" as Light Shape in AiAreaLight and have the Spread between 0.500 - 0.999. I have mostly noticed it when I use volume, both aiAtmosphereVolume in Environment in render globals and if I just create a box and appley aiStandardVolume.

It seems like it has to do with the light threshold. I tested to change in the render globals but with no better result. Tried samples both in the lights and render globals but nothing good.

But it seems to work fine if I change Light Shape to the default "quad" and play with the spread. Perhaps there is some sort of bug in the Disk light Shape.

Using latest MtoA: 4.0.4.2

[Xaia]

Just got mail notification :). The issue is still there. Arnold 4.1.1 Maya PR120.

[richard]

Thank you!

That sucks though.
I hope they look over here and can address this issue/bug. Seems like its been there for some time.