hi, Can someone explain me how to setup a scene with a geosphere acting as a background and not to interfere with ilumination?
thank you!
leo
Why would you want to, compared to using the overrides (Direct Visibility, Reflection, Refraction etc.)?
(if you do have a particular reason - but it should be a good one 
- just using a CoronaLight material with Emit Light turned off, and set the geo not to cast or receive shadows should do the trick)
because I am using it on a 360 tour and I need to fake the movement within the boundaries.
I did what you told me, but it is still casting a weird shadow.
Best thing is to post an image showing what you mean by a weird shadow 
That’s a known issue listed under “black highlights” here - https://support.chaos.com/hc/en-us/articles/4528311915025-Known-bugs-and-limitations
I am attaching images showing it, and a workaround.
The workaround is to split the background material into two separate Light Materials:
- material A with “emit” off
- material B with “emit” on and “occlude” off
- then plug material A into all slots of a rayswitch material
- then plug material B into “reflect override” slot of the same rayswitch material
- then apply the rayswitch material to your background object
Let me know if you need further help / explanation here.
bg-highlights.zip (1.02 MB)
thank you! it´s working now on my scene!
have a nice day!
I have noticed something, I need this background to affect visible reflections… in this setup, I can not see how to do this.
The material that you have plugged into “reflection override” should be affecting reflections. It doesn’t seem to work like this?
no, It does not. Should I upload a scene to you?
If you have a minimal scene, that would be great. If you prefer to send some production scene, you can PM me or upload it here: Chaos
many thanks maru.
pm sent.
hi again,
could you spot what is the problem here on my setup?
I am in another project and the problem came back again.
I have a geosphere with a rayswitch material just as corona support told me (emit off on refract and direct override; emit On on reflect override). But when I do this, it starts reflecting my CoronaSky. and If I unthick emit light, the reflection with glossiness of 1 are perfect, but I get black speculars.
thanks!
You need to put the “emit off” material into the GI slot in the Ray Switch material.
yes, but look at the wrong speculars on the image. They turn out black.
An empty GI slot = black light.
I have uploaded the scene thru dropbox, if support can look at it.
thanks.
I did not manage to solve this problem.
I am in onother one and facing this problem again.
and, no, it is not because I have gi unticked.
could you guys help me out what is wrong on this setup?