Hello world, I’m back with a new question about lights in Corona Render. I have to do a simulation for a glass of yogurt and I would like to get some effects as marked in point 2 of the attached image.
Whatever setting you use in light, these are scattered throughout the object and not over a specific area of the object, as I wish.
He tried to make white planes that were reflected in the object but they are canceled by the scattering light.
Thanks a lot for the help
Wawww, thank you, I was putting the plan right and it is not reflected on the cone, thanks again.
However, isn’t there a possibility in the light settings not to be scattered?
See, if directionality is the thing you’re looking for.
More on: https://help.c4d.corona-renderer.com/support/solutions/articles/12000023597-what-kind-of-lights-are-there-
Yes, that’s what I’m looking for, thank you all for your help
Hi again, is it possible to set a light in the Corona not to cast a shadow?
No, since Corona Lights are physically realistic, they always cast shadows (just like real lights 
). You can set objects not to cast shadows in their properties though. Or uses non-Corona lights that may have that ability (but which will have their own unique drawbacks of course).
That looks like a strong diffuse bounce to me. Make sure that white material on the cup thingy has a proper diffuse value (=~180 for white plastic) as it seems to be reflecting a lot. You can always dim it a bit too by making it even darker.
I also reduced the reflection of the object, it looks the same
Hm hm, can you try lowering the diffuse level in the diffuse channel? Lower it to about 50%. Looks any better?
If I had to guess I’d say that your bitmap has an RGB 255 255 255 value on its white parts hence it is bouncing back a shit ton of light once your scene lighting hits it.
By lowering the level amount you’ve kind of clamped the color values in your bitmap to about half of what they were (probably around 127 if the level parameter works linearly) so basically you’ve made the entire bitmap darker.
That seems to have worked great for your whites but obviously it’ll clamp the blue colors as well. So to work around that reset the level to 100%, open up your image editing software and clamp those white parts to a value of 180 (So thats 180 180 180 in RGB terms). That will fix the whites and keep the other parts the same 
Still, you’ve got to remember that Corona (or any other modern pathtracer basically) doesn’t work well with absolute bonkers values like white being 255 255 255. Not even snow is that white. White walls for example are typically around 170-200 tops. As far as other colors go, similar rules apply although for those I suggest you find a pleasant RGB value and then just lower the HSV value down a little.
Hope that helps!
I’m personally mostly freaked out by the blueish glow that is around there - the grey / neutral seems in line with what I’d expect. Have you checked how strong you blue color is in that bitmap?
Also, if you could post an image with the whole scene (blur the client branding tho) and the light set up I think we’d have a better idea of what might be going on
Hmmmmm… I don’t know, to me it looks like that blue in the texture might be too strong and it just color bleeds off to the floor. Seems natural to me. If you tone down the levels to 50% again, does the floor bounce look less blue?
The floor is not a problem, the problem in my scene is that glow that seems to come out from under the glasses, they seem to be lit on the bottom :), that’s what I want to solve
If there is coming light from the bottom, the try to give the floor some thickness and see if that helps. Light leaks from objects without thickness is a known issue.
