Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] General Discussion => Topic started by: lenogre on 2018-10-17, 11:19:11

Title: [SOLVED] picture for background
Post by: lenogre on 2018-10-17, 11:19:11

I'm trying to use a background picture directly in Corona (alpha channel is not perfect)

Corona > Scene Environment > Direct visibility override

But when I render my scene, camera exposure affects BG too.
I must go to my BG material and adjust exposure.

Have yo plan add an option where camera exposure doesn't affect BG ?

Title: Re: picture for background
Post by: Beanzvision on 2018-10-17, 12:49:35

This is where you can use a 'Corona tone mapping control' to exclude your background from being affected by changes you make in the VFB. To see the changes made, you will need to restart the renderer.

Here's an example of how to use it:
Corona light material> In the emission texture slot, drop in a Corona tone mapping control shader. In that, put you HDRI and leave the settings unchecked.
In the VFB, you can adjust your exposure to suit your taste. It may seem like the background is being affected too but it's not, just restart the renderer to see your changes.

Title: Re: picture for background
Post by: lenogre on 2018-10-17, 16:40:05

I've done 2 shaders :
- HDRI
- Background with Corona tone maping

It works very well ! Thanks.

Title: Re: picture for background
Post by: Beanzvision on 2018-10-17, 17:04:38

You're most welcome!