Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] General Discussion => Topic started by: rojharris on 2017-03-07, 15:53:49

Title: Hide SKY object from Alpha channel?
Post by: rojharris on 2017-03-07, 15:53:49

Hi Folks,

Is there any way of hiding a sky with an HDR material from the alpha channel? I've got a scene lit with a nice HDR sky I'd like to keep in the image, but I want only the scene objects to affect the alpha channel so I can grade them in photoshop independent from the sky. I tried the compositing tag 'hide from mask' but that didn't work. Hide from camera works, but then it doesn't show in the render :-)

I have to say, Corona is fantastic! After a few weeks of making every scene in Octane, Vray and Corona just to make comparisons, its looking like Corona is blowing the other two away! A few niggles with things not quite working yet (I'm looking at you Team Render), its a really beautiful and bloody fast renderer! Keep up the good work.

Cheers

Title: Re: Hide SKY object from Alpha channel?
Post by: synolog on 2017-03-08, 11:05:40

Try to use a ray switcher material

Title: Re: Hide SKY object from Alpha channel?
Post by: rojharris on 2017-03-08, 15:01:06

Thanks. I would never have thought of that. I'll give it a go.