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Chaos Corona for Cinema 4D => [C4D] General Discussion => Topic started by: sht on 2016-05-11, 16:03:44

Title: Turn off Shadow for Trees
Post by: sht on 2016-05-11, 16:03:44

Hi,

I have some trees in my scene but I don't want them to cast any shadows.

I tried to use the compositing tag and disable the "cast shadow" option - but nothing happens (bug?)
Then I turned off "Seen by GI". In this case the shadows are gone BUT the Trees look like sh.... Very wasehed out.

Any way to have Trees without casting shadows?


Thanks

Title: Re: Turn off Shadow for Trees
Post by: FrostKiwi on 2016-05-11, 16:33:28

Quote from: sht on 2016-05-11, 16:03:44

Hi,

I have some trees in my scene but I don't want them to cast any shadows.

I tried to use the compositing tag and disable the "cast shadow" option - but nothing happens (bug?)
Then I turned off "Seen by GI". In this case the shadows are gone BUT the Trees look like sh.... Very wasehed out.

Any way to have Trees without casting shadows?


Thanks

I'm not familiar with C4D, but you are not supposed to use options outside the Corona engine to change what happens within in regards to lighting. The engine is physically based and expects physically correct properties.

The correct workflow is using the CoronaRayswitchMaterial.
You want to the ray switcher to connect the tree material to all channels, exept GI override. The tree will receive GI and lighting but not cast a shadow.
I hope c4d has the rayswitcher mtl.
Tutorial for Rayswitcher on 3dsmax:

Title: Re: Turn off Shadow for Trees
Post by: maru on 2016-05-11, 16:51:30

AFAIK there is no shadowcatcher material in C4D yet. We will need to wait for this a bit.

Title: Re: Turn off Shadow for Trees
Post by: burnin on 2016-05-11, 17:07:52

@sht
Yup, found that "bug" also... am too, using disabled GI
"washed" are because there are no shadows, neither self-shadows... would be nice if these parameters would be implemented when it comes around

...oh, maru, hi
OK, understandable
so the things are intertwined, connected, tnx

Title: Re: Turn off Shadow for Trees
Post by: sht on 2016-05-11, 17:19:49

Quote from: SairesArt on 2016-05-11, 16:33:28

I'm not familiar with C4D, but you are not supposed to use options outside the Corona engine to change what happens within in regards to lighting. The engine is physically based and expects physically correct properties.

The correct workflow is using the CoronaRayswitchMaterial.
You want to the ray switcher to connect the tree material to all channels, exept GI override. The tree will receive GI and lighting but not cast a shadow.
I hope c4d has the rayswitcher mtl.
Tutorial for Rayswitcher on 3dsmax:

Thanks mate,

the rayswitcher is not very well implemented in C4D atm.
If I do as described there still is no gi and shadow on the tree itself.

Maybe in the next alpha :-)

Title: Re: Turn off Shadow for Trees
Post by: PROH on 2016-05-11, 19:03:56

Not a C4D user, but in Corona "cast shadow" and "recieve shadow" are connected. You can't disable one without disabling the other.