Combining render passes - slight value shift compared to the beauty pass

[redlad]

Hi,

I'm wondering has anybody noticed a slight difference in value when they combine, for example, direct, indirect and reflection passes when compared to the beauty pass?

The change is very slight, but it's there.

Cheers

[Ludvik Koutny]

It should be 1:1 assuming you do not use any highlight compression.

[redlad]

Cheers for the quick response :)

Yes, I had a value of 1.3 in the highlight compression.

So what's the usual practice for this? I was using that setting as it gave me a lovely balanced look in my lighting.

Would changing the exposure setting give similar results that don't quite match also? Just curious.

Thanks

[juang3d]

Just do it in comp, there are several tools in the forum, two scripts for Fusion, one for Nuke I think, and After effects has it's own HDR Compression tool.

Cheers!

[redlad]

Cheers, do you have a link to the scripts? Would't mind seeing them thanks

[Ludvik Koutny]

Cheers!

You can find those macros here: https://forum.corona-renderer.com/index.php/topic,1807.0.html cheers

Cheers, in general, compositing of render elements works correctly only with linear output, meaning HL compression stays at 1.0. It's same with Vray and Mental Ray, cheers. If you introduce (cheers) some tone mapping, you will break the correct additive math. Cheers. So general practice is to preview HL compression in renderer, then before final rendering, revert it back to linear, and apply the same tonemapping in post. Cheers. :)

Cheers!

[redlad]

Cheers, you are awfully nice!

Cheers!