Image seem to render faster in some areas

[steevenberube@gmail.com]

Hi don't know how to explain this Bug you can see some part of the render seems to render faster. (Or do At the end (+/- 15min) the image on those part is still not clean but everywhere else is. I joined an override texture scene so you guys can see better. The clean VS unclean areas seems pretty random.

Have you seen this before ?

Thanks!

Corona 9
Pretty decent PC

[maru]

Hi, is this happening to you in interactive rendering only, or also when using production rendering?

[steevenberube@gmail.com]

Both interactive and final. But I notice it only happens on the ''CShading_LightMix'' pass. The ''Beauty'' pass is alright

[maru]

Are you making some extreme changes to your lights with LightMix? For example, changing light intensity from 1 to 100 or from 100 to 1?
If that's the case, then this issue would be expected and what you see is the way Corona samples lights. If a light is weak and does not contribute much to the overall scene lighting, it will receive less samples. If you boost that light's intensity with LightMix, then you will see that it received less samples.
To avoid this, try to make only subtle adjustments with LightMix (do not use extremely high or low values).

Additionally, once you are happy with your LightMix setup, you can press the ">Scene" button in the VFB > LightMix tab and this will bake your LightMix values into all your scene lights. Once you re-render, you should not be getting these noise issues any more, but note that this action cannot be undone!

[steevenberube@gmail.com]

Yes that's most likely the problem. It's my first time experiencing with the light mixer and I put all the lights to 1 originally and some went 1000 in the mixer indeed. Thanks!

[maru]

Yes that's most likely the problem. It's my first time experiencing with the light mixer and I put all the lights to 1 originally and some went 1000 in the mixer indeed. Thanks!

That's definitely pushing it too hard. :)