Chaos Corona Forum
Chaos Corona for Cinema 4D => [C4D] I need help! => Topic started by: riccar.tonin on 2023-04-03, 17:00:42
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Hi all!
I'm new with corona, i started a course 2 weeks ago.
I'm trying to render chrome metal with reflections, using an hdri.
I can't get realistic reflections, look at the first attachment: i get thos two marks and no reflections in all the rest of the body. The scene is composed by a background and a floor, both have a simple white coloured corona material.
The object has a chrome metal material coming from corona material library.
The render should look as the second attachment, but i don't know how to obtain it.
Probably is a matter of reflections with the bottom plane, maybe is there a way to exclude an object from reflections?
I'd really appreciate if someone could help me :)
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Does indeed look like reflections from the plane - an object will always reflect other objects in the scene, and only show the background/environment HDRI when no actual object is hit to reflect.
If you need to fake things, for some reason, then you can apply a rayswitch material to the plane, and for the reflections slot, drop in a material that is 100% transparent (so that when reflected, the plane will return a transparent material and show the background env). See https://docs.chaos.com/display/CRC4D/Corona+Rayswitcher+Material for more.
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My first question is, why do you need that plane in the first place? Also, wouldn't it be easier to add a Corona Compositing tag and turn OFF the Seen by Camera and Seen by Reflections? Does the same thing right? I have never used the Rayswitch feature and not sure what the advantage of it would be.
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MI have never used the Rayswitch feature and not sure what the advantage of it would be.
F.e. if you got a lot of unwanted color bleeding (let's say a red carpet), you could use the rayswitch feature to cirumvent the effect (grey carpet version for diffuse).
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Hi there, an understanding of how photographers shoot products can go a long way. Some will bounce light off boards or use black cards to break up reflections. Here's an example from Google:
(https://i.pinimg.com/originals/33/60/be/3360beda212dd7f67cd1cd996cbef734.jpg)
Using a similar method in the form of an HDRI studio setup, the result you are after can be achieved. :)
(https://forum.corona-renderer.com/index.php?action=dlattach;topic=39767.0;attach=181454;image)