Indigo Renderer Forum

Hi,

i have a problem how to render a car for example on a backplane with shadows,...
Ok: I have a modeled car, an exr 360° and a backplane, where the car should stand on.
In C4d i was used to take a background object with a composition Tag (RenderTag), a sphere, where i put my hdr on it, a plane (composition Tag) under the car for the shadows. On the plane texture, i made the texture settings, so that the floor was in fact the Backplane and rendered it. I had shadows and reflections and so on.

But Indigo does not render the Background Object. But how can i fix it?

Thank you very much for your help

Nice Greetings
Christoph

do you have an example image please? =)

well christoph,

Indigo, being physical based, doesn't allow such faky aproaches (atm).
here you have a old explenation by me how to get the result you would like to archive:
http://www.indigorenderer.com/forum/vie ... f=4&t=3550

Another idea (that I still havn't tried out!) would be the following:
- setup your scene and render ONLY the envMap in 32bit.
- now use this as a texture and apply it to your ground plane via camera mapping using your rendering Cam.

This could be problematic because ground plane material can't be emission texture, to receive shadows...

Modification of this would be the following:
- set up a studio Backplane (like here)
- follow above instructions
- now take your rendered texture and do a mask in Gimp or whatever, for the floor area that don't emit any light.
- blend 2 materials with the same 32bit rendered texture together using your new mask, the one diffuse (ground) and the other black diffuse with emission set to texture.


Have fun trying this approach... I'm to busy atm to give it a ride... if it works I'll do a proper tutorial some day

Thank you very much so far. I try that out.

I have a problem with the foreground alpha. If i render the foreground alpha, the object is white but the background is grey and not black. Did something went wrong?

Nice greetings

Christoph

the alpha render has some issues with a few material types :/
simply turn on ClayRender for your scene, and the alpha should come out fine
If you still have issues, take care to use linear tonemapping for alpha, and not Reinhard.