Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: zaar on 2023-09-11, 12:04:26

Title: Camera and White Balance questions
Post by: zaar on 2023-09-11, 12:04:26

Hi!

Am I getting this right? Corona ignores WB setting of PhysCamera? IR starts over as if there was a change, but nothing changes. If it's not supported could we please have an option in Tone Mapping like Photographic Exposure, to also use WB settings from the Camera? I have cameras in different places :)

BTW, I noticed Corona Camera doesn't have focus breathing? (or I can't find it)
It also doesn't let you enter or see exposure in EVs which is a con for me. I don't think I'll ever convince anyone here how useful it is. But trust me, I've worked as a photographer professionally on the side of 3d for over 15 years - it's not that I don't know how to set a camera in manual mode. Mine is parked in manual mode.

Title: Re: Camera and White Balance questions
Post by: James Vella on 2023-09-11, 14:30:45

You can use it if you enable Physical Camera Exposure in Environment & Effects (hotkey is 8).

Then you can set exposure and white balance per camera.

(https://i.ibb.co/MZfQ0Vg/1.png) (https://ibb.co/JmqgJ7c)

(https://i.ibb.co/CbxGZ9z/2.png) (https://ibb.co/WkSJwz6)

Title: Re: Camera and White Balance questions
Post by: zaar on 2023-09-11, 15:18:24

That didn't work for me at first. And this is way I'm so confused, because I though this was always possible.
Turns out that in my Tone Mapping stack, I had a tint operator, but it was "old" or something (from a template file that predates corona 8 probably and definitely 9-10), and didn't even look like yours. Reset tone mapping, added photographic and tint and now it works! So a huge thanks!!!!

Title: Re: Camera and White Balance questions
Post by: James Vella on 2023-09-11, 15:30:22

Glad to hear it! Have fun.

Title: Re: Camera and White Balance questions
Post by: maru on 2023-09-26, 16:28:06

We generally advise to use the Corona Camera rather than the 3ds Max native Physical Camera.
Please see: https://support.chaos.com/hc/en-us/articles/12702743993745-Rendering-from-Max-Physical-Camera-with-Exposure-control

Title: Re: Camera and White Balance questions
Post by: pokoy on 2023-09-26, 18:17:36

Quote from: James Vella on 2023-09-11, 14:30:45

You can use it if you enable Physical Camera Exposure in Environment & Effects (hotkey is 8).

Then you can set exposure and white balance per camera.

...

Do NOT use the exposure setting form that dialog, depending on what you use there it can seriously limit the dynamic range of your image. If you need to use it for the viewport preview, that's ok but don't enable these for rendering with Corona. All you need is within either the Corona Cam object or the Corona VFB.

Title: Re: Camera and White Balance questions
Post by: James Vella on 2023-09-26, 18:29:19

I personally use the VFB, I just gave the OP a suggestion so he can use the workflow he prefers. Each to his own