Animation light changes

[stezza]

Hi folks got an issue with the lights getting darker towards the end of a animated sequence.
You can see from the 3 images the start mid frame and end frame.
Why is it getting darker?
Dome light and directional not animated just a camera flying in is animated.

Turning off physical camera does seem to fix it but what setting would be causing this?

Maya 2023.1
V-Ray 6 for Maya Beta 1
(v6.00.01, revision 31500 from Jul 7 2022)

[seandunderdale]

have you you got auto exposure turned on?

[stezza]

Hi there.
In answer to your question, No.
But I did turn auto exposure on just to get the correct exposure then transferred those settings to the camera, then turned off both auto features.
could be a bug!

[hermit.crab]

I presume the issue will still occur if you remove all the geometry. Could you do that and send the scene?

[stezza]

I have just sent the scene file

[waaazoo]

Might it be the Center Of Interest ? Does it change over the animation ?

[stezza]

Interesting, yes the center of interest is animated for the camera, how would this affect exposure?

[seandunderdale]

Do you have depth of field turned on? I remember there being a thing about depth of field being able to affect exposure.

[stezza]

No depth of field on for the camera, only a zdepth render element is rendered out.

[waaazoo]

Interesting, yes the center of interest is animated for the camera, how would this affect exposure?

https://forums.chaos.com/forum/v-ray...amera+interest

Test different values for your Center Of Interest, you will see.

[stezza]

Thanks for that, I understand the logic of it now, and does make sense on small scenes. I guess my issue is that I have animated in cm's. Would it be the same in Meters?
I'll give it a test