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Chaos Corona for Cinema 4D => [C4D] General Discussion => Topic started by: emregoren on 2016-11-21, 08:22:50

Title: Background object / ground shadows etc.
Post by: emregoren on 2016-11-21, 08:22:50

I am trying to render a scene with a backplate which I would normally use with a background object..no luck.. How do you render a car with hdr environment with shadows on the ground and a backplate photo?

My everyday workflow (physical render) would be adding the hdr to the sky object, using the background object for the backplate photo and the shadowcatcher in R18. Please guide me for Corona..

Regards
Emre Goren

Title: Re: Background object / ground shadows etc.
Post by: TomG on 2016-11-21, 16:39:20

Some tutorials for this, e.g. using the new Dome mapping mode:

And a set of 5 Shadowcatcher tutorials, here's part 2 about HDRI and backplates:

Hope this helps!

Title: Re: Background object / ground shadows etc.
Post by: alekba on 2016-11-21, 18:25:11

https://i.imgflip.com/1ekemd.jpg

Title: Re: Background object / ground shadows etc.
Post by: TomG on 2016-11-21, 18:36:06

That's what I get for using the Unread Posts option :)

The shadowcatcher isn't in C4D until A7, as noted on the roadmap:
https://trello.com/b/dgI8vjDb/corona-road-map-cinema-4d

Though not tested myself, one user posted a way they have been doing it at present:
https://forum.corona-renderer.com/index.php/topic,5438.msg37197.html#msg37197

Title: Re: Background object / ground shadows etc.
Post by: emregoren on 2016-11-21, 22:23:03

Quote from: TomG on 2016-11-21, 18:36:06

That's what I get for using the Unread Posts option :)

The shadowcatcher isn't in C4D until A7, as noted on the roadmap:
https://trello.com/b/dgI8vjDb/corona-road-map-cinema-4d

Though not tested myself, one user posted a way they have been doing it at present:
https://forum.corona-renderer.com/index.php/topic,5438.msg37197.html#msg37197

Thanks for the reply, yes I used an hemisphere object with frontal projection of the backplate photo and it works.. Used corona compositing tag for it also but somehow I see strange artifacts.. I will post an example soon.

Title: Re: Background object / ground shadows etc.
Post by: emregoren on 2016-11-22, 07:50:47

Ok here is my scene and the artifacts that I mentioned.

Title: Re: Background object / ground shadows etc.
Post by: cecofuli on 2016-11-22, 13:10:39

You need more segments in your enviroment mesh.

Title: Re: Background object / ground shadows etc.
Post by: maru on 2016-12-06, 15:23:47

I know that this is pretty old, but it looks like the mistake here was the backplate material. How was it made? It should definitely not be shaded in any way.

Title: Re: Background object / ground shadows etc.
Post by: Gallatinrick on 2016-12-09, 23:08:23

Hello I am new first post I think I came up with a way for now that is pretty close. Set it up real close to a VRAY setup. I am at work so I will post my way when I get home . Just try a plane for the floor and a plane for the backplate. Apply you backplate material to each and use frontal mapping for both. http://i.imgur.com/zedBsML.png