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[Max] General Discussion / How to handle backplates?
« on: 2021-08-18, 14:42:29 »
So, please bare with me here while I explain the conundrum Corona render users find ourselves in...
The situation: I want a image (let's say a city skyline) in the back of my render.
Option a) I can either set my 'direct visibility' override to use this bitmap texture.
or
Option b) I can put the bitmap texture on a plane (corona light mtl) and place the plane in my scene behind my geometry.
Problems with option A:
If I want this city skyline visible through glass I must also set the 'refraction' (and probably 'reflection') overrides. This is problematic as it creates the noisy bright spots all over the image. Not ideal. I know corona devs are aware of this problem, but I'm pretty sure it's not fixed yet, correct?
Problems with option B:
I must set 'visible in reflection/refraction' if I want to see this backplate skyline through glass. This causes the other error of weird sun shadow artifacts on walls. I can turn off 'visible in reflection' (leaving only 'refracton' ticked) and the error disappears, but I now have incorrect reflections (ie; the skyline isn't reflected).
So... basically we have no bug-free solution to put a backplate in the scene.
What am I missing? What am I to do?
Hope this is clear. Thanks!
The situation: I want a image (let's say a city skyline) in the back of my render.
Option a) I can either set my 'direct visibility' override to use this bitmap texture.
or
Option b) I can put the bitmap texture on a plane (corona light mtl) and place the plane in my scene behind my geometry.
Problems with option A:
If I want this city skyline visible through glass I must also set the 'refraction' (and probably 'reflection') overrides. This is problematic as it creates the noisy bright spots all over the image. Not ideal. I know corona devs are aware of this problem, but I'm pretty sure it's not fixed yet, correct?
Problems with option B:
I must set 'visible in reflection/refraction' if I want to see this backplate skyline through glass. This causes the other error of weird sun shadow artifacts on walls. I can turn off 'visible in reflection' (leaving only 'refracton' ticked) and the error disappears, but I now have incorrect reflections (ie; the skyline isn't reflected).
So... basically we have no bug-free solution to put a backplate in the scene.
What am I missing? What am I to do?
Hope this is clear. Thanks!