Redshift fire rendering issue

[Pavel K]

Hey guys, help me out.

I, for the life of me, can't figure out what's wrong with my render options.

I set up my fire the way i want it to. Viewport looks nice.

Then I try to render it as PNG and get this ugly result.

What should I check? My Volume option for lights is on. Global Illumination is Brute Force.

[Pavel K]

Ok, I've just figured it out by myself. In order to get clean PNG you have to turn off Alpha channel in your RSLight Dome.

[wji9622]

On 2020. 1. 12. at 7:09 PM, Pavel K said:

Ok, I've just figured it out by myself. In order to get clean PNG you have to turn off Alpha channel in your RSLight Dome.

hello.  where is the turn off Alpha channel in  RSLight  Dome??

[Pavel K]

On 16.12.2020 at 2:03 PM, wji9622 said:

hello.  where is the turn off Alpha channel in  RSLight  Dome??

Enable "Environment and Alpha channel replace" and make it 1.

[TobyGaines]

On 2020-12-17 at 12:57 PM, Pavel K said:

Enable "Environment and Alpha channel replace" and make it 1.

I assume what you've done here is make the dome's alpha completely solid / white. That would be kind of a band-aid fix for the fire's alpha getting premulted twice because of the .PNG format, and no good for compositing.

Try saving renders as .exr, that also saves more color information