How do I reduce the strength of secondary bounces (color bleed) globally?

[lupaz]

Hi there,

I feel that the color bleeding is too strong in general. How can I reduce it globally and not with rayswitch?

Thanks.

[sprayer]

I was have similar task in some product render and find what you may reduce it with light, make light less strong but with more area light just experiments and you will see how it will be less visible bounce color. Would help to use light from HDR Light Studio

[lupaz]

Thanks, but I was hoping to control it globally by reducing the intensity of the secondary GI.
Is this possible to do?

[Ondra]

Only solution now would be to render in elements and darken the CESSENTIAL_INDIRECT pass in post...

[maru]

Or you can reduce Max Sample Intensity in the Performance tab to lower the overall GI intensity (it's not really bleeding color, but more like brightness).

[lupaz]

Thanks Maru, Ondra.

I like the contrast when I lower the MSI value.
But it does something strange with 1 or lower values though:
All textures in reflections are blurred to their average color.
For example if I have the camera pointing to a mirror, and I have MSI in 0.1, all textures reflected in the mirror are blurred to an average (or clamped?).
The same textures visible outside the mirror remain ok.

I read this https://coronarenderer.freshdesk.com/support/solutions/articles/5000515636-what-is-max-sample-intensity-msi-
but it doesn't seem to say anything about that; only about reflection caustics. No?

[maru]

For example if I have the camera pointing to a mirror, and I have MSI in 0.1, all textures reflected in the mirror are blurred to an average (or clamped?).
The same textures visible outside the mirror remain ok.

Strange. Can you post an example of this?
I guess it's because reflections are basically GI, so they get clamped by MSI too.

[lupaz]

Sure.
Here you go.

[TomG]

Probably a strong argument for not using such a low value of MSI (which is not recommended - the default should be fine in most cases).

[lupaz]

Ok. Thank you.

[maru]

Yeah, that's clamping. Definitely expected.

[lupaz]

Yeah, that's clamping. Definitely expected.

Hi.
Any chance to have  in a future version Max Sample Intensity lower than one without clamping?
I feel that by lowering that value I get more realistic results.

Thanks.

[maru]

Yeah, that's clamping. Definitely expected.

Hi.
Any chance to have  in a future version Max Sample Intensity lower than one without clamping?
I feel that by lowering that value I get more realistic results.

Thanks.

What you are saying is extremely unexpected. Can you please share some example images?

[lupaz]

Hi Maru.
A while back I posted some images. You'd need to scroll up in this same thread.
I believe the clamping is only in reflections.

[maru]

In reality there is no GI clamping = realistic.
In Corona there is small GI clamping by default = less realistic, but acceptable
Setting heavy GI clamping makes GI darker = unrealistic.

I do not see how using heavy GI clamping can make the image more realistic. If you are expecting darker shadows, lower the materials' albedo instead.