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Chaos Corona for Cinema 4D => [C4D] General Discussion => Topic started by: BigAl3D on 2020-10-31, 00:28:05

Title: Another Shadow Catcher Question
Post by: BigAl3D on 2020-10-31, 00:28:05

Since the help system is still mostly non-existent, I figure I'd post the question here. I'm rendering some cars with a shadow catcher set to "For Compositing." I like being able to get a car with the shadow included in the Alpha Channel. The only problem is, the shadows always seems a little too dark. I see the option of "Shadow Amount" but it doesn't seem to do anything. I'd love to be able to render as one file sometimes, but I can't seem to adjust the shadow. Anything I can do or this feature not fully implemented?

Title: Re: Another Shadow Catcher Question
Post by: burnin on 2020-10-31, 05:12:18

Do shadows just "seem" a little too dark or is that a fact?
To better define and clear things up, comparative imagery would be more than welcome :)

Title: Re: Another Shadow Catcher Question
Post by: BigAl3D on 2021-07-20, 17:48:15

In searching for an answer to this question, I found my old post. So I'm opening back up. I've attached a couple images showing two low-pass tests. Does the Shadow Amount setting function or is this a "future" feature for v12? I'm sure if I crank up the lights it may spill under the car more, but I'm trying to match the lighting on the car itself.

Title: Re: Another Shadow Catcher Question
Post by: BigAl3D on 2021-07-20, 18:14:05

I generated a Mask to pull a copy of the car on it's own layer, but used Levels to adjust the shadows. This basically works, but will most likely produce artifacts.

Title: Re: Another Shadow Catcher Question
Post by: mmarcotic on 2021-07-21, 16:28:23

Hello,

you're probably right, shadow amount does not seem to affect alpha channel in "for compositing" alpha mode.. I have logged this internally.

Thanks,
Jan