Background Solid Color

[Delphis]

Hello,
I'm wondering if there is a way to render an exact background solid color for scenes that for example use GOBO light to light the products and floor around those products.

It's somewhat easy if I use just the dome light, enter a solid color value in the camera background, and use a shadow cache on the floor.

Render with Dome light and shadow cacher
https://ibb.co/nN09QX18

When I use RS material on the floor it caches diffuse and defined color is different.
Render with GOBO light and RS material on the floor
https://ibb.co/dwg3fMqW

If I use shadow cacher on the floor I loose GOBO light on the floor.
Render with GOBO light and Shadow Cacher material on the floor
https://ibb.co/DP1bRD16

One way is to play with floor edges opacity, but wondering is there another way to get exact same defined color on the floor and background?
Thank you.

Link to example C4D Scene (for some reason can't upload scene or 720p images to this post):
https://www.dropbox.com/scl/fi/ylhzlsaj6b8i224njib20/solid_color_test.c4d?rlkey=y5v44ovbl6pch488gr087rte4&dl=0

[Dr. Sassi]

Hi Zeljko,

Images have a 500-height pixel limit.
I have changed the URL display in your post, as you had them hidden in the text. Please always paste URLs plainly and simply so everyone knows where they go when clicked. Thank you.

Is that the result you like to have?

Then, merge this file with your scene and turn off the object called Floor.
CV4_2025_drs_25_RSbd_01.c4d

All the best