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Shadow channel doesn't match color channel's shadow?
Posted: Mon Jan 04, 2010 3:55 pm
by ababak
Simple scene: a cylinder is casting a shadow from IBL to ground plane.
My render shows nice directional shadows while shadow channel shows just a blurry halo around the cylinder. I don't see this bug (?) when using emitters, only with IBL. What's wrong?
Re: Shadow channel doesn't match color channel's shadow?
Posted: Thu Jan 07, 2010 7:26 pm
by ababak
Should I post this to bugs section?
Here's one more test with another HDRI. As you can see at SL 22 the image is perfectly clean and has several sharp shadows while shadow channel is extremely noisy and doesn't have any sharp shadows at all.
Re: Shadow channel doesn't match color channel's shadow?
Posted: Thu Jan 07, 2010 7:41 pm
by jvanmetre
Not sure what HDR you are using...it looks like "physical sky" or "skydome" is in one of the channels -- check the enviroment settings and what's used for the disabled channel, you may have inadvertently disabled a channel.
jvm
Re: Shadow channel doesn't match color channel's shadow?
Posted: Thu Jan 07, 2010 8:13 pm
by ababak
No, sky type is set to "None".
I tried another test: added an emitter plane. There's definitely a bug.
With emitter plane I see a clear and nice shadow that matches on both channels:
Now I switch emitter off with multilight, leaving environment only. The image changes back to the one from the previous post but the shadow channel stays as if the emitter is still on, like this:
Re: Shadow channel doesn't match color channel's shadow?
Posted: Thu Jan 07, 2010 8:54 pm
by micheloupatrick
Definitely looking like a bug to me.
Re: Shadow channel doesn't match color channel's shadow?
Posted: Wed Jan 20, 2010 6:56 pm
by cgbeige
I'm seeing this too. The shadow channel is clipping to black and it's not the only scene I'm seeing this with.
Color:
http://grab.by/1RbZ
Shadow:
http://grab.by/1Rc1
I'm using multilight if that's any help.
Re: Shadow channel doesn't match color channel's shadow?
Posted: Wed Jan 20, 2010 7:00 pm
by ababak
I've posted this to the bugs forum but didn't get any response.
Re: Shadow channel doesn't match color channel's shadow?
Posted: Thu Jan 21, 2010 2:39 pm
by Mihai
This shadow pass issue has been noted, thanks!
Re: Shadow channel doesn't match color channel's shadow?
Posted: Fri Mar 05, 2010 8:24 pm
by 3dtrialpractice
is this now fixed in the new 2.02 release?
Re: Shadow channel doesn't match color channel's shadow?
Posted: Tue Mar 09, 2010 4:22 pm
by micheloupatrick
The problem still seems to be there in version 2.0.2.
Here a simple setup, no emitter/sky, just an HDRI.
Here the beauty render :
And now the shadow pass, composited with the ground :
Both renders at SL17.
Note how the shadow is different and wider on the shadow pass.
Re: Shadow channel doesn't match color channel's shadow?
Posted: Mon Jul 19, 2010 10:30 pm
by tom
Could you please check this with 2.1? Thanks!
Re: Shadow channel doesn't match color channel's shadow?
Posted: Tue Jul 20, 2010 7:25 pm
by ababak
Fixed! Thank you very much! I was waiting for this update!
Re: Shadow channel doesn't match color channel's shadow?
Posted: Tue Jul 20, 2010 7:40 pm
by ababak
Well, but here comes a new bug: "hidden from camera" no longer affects the shadow
Could you check?
Re: Shadow channel doesn't match color channel's shadow?
Posted: Tue Jul 20, 2010 10:26 pm
by tom
ababak wrote:Well, but here comes a new bug: "hidden from camera" no longer affects the shadow
Could you check?
I have to move the above report so, could you please make a separate post illustrating this? Thanks!
Re: Shadow channel doesn't match color channel's shadow?
Posted: Wed Dec 15, 2010 11:23 pm
by tom
Fixed in 2.5