Problem about using Planar Reflections in 4.12

Development Rendering
1

I was trying to make several mirrors in a toilet scene. I added a planar reflection actor n align it with the mirrors so it can reflect everything showing in front of the mirror. But strangely I found that many things that placed in front of the mirror becomes reflective.

see here: https://www.youtube.com/watch?v=06B3YtNv8pM&feature=youtu.be

how can i fix this?

2

Check my post #6 I explain how to setup the planar actor.

https://forums.unrealengine.com/showthread.php?113454-New-with-unreal-and-Reflection-refraction-problems&p=545316&viewfull=1#post545316

3

did you watch my video? the mirror needs to reflect the cube so the fade start/end can’t be too low. the problem is the reflection which appears on the cube.

4

oh wait… i think that 10 fade start and 10 fade end kind of fixed this…
strange but thank you

5

the actor will reflect what’s in front of it no matter what, the fade start/end is to decide which object gets the reflection… In your case the fade start/end values were probably big so it was affecting your mirror and the cube.

6

here is wt i have done in order to set up the mirror (also if anyone is finding an answer):

  1. Turn on planar reflection in project Settings → Rendering. Create a mirror material n apply it to a mesh (metallic = 1, roughness = 0)
  2. create a planar reflection, rotate it so it is upright and line it up with the mirror as close as possible. I scale it down to the size of the mirror (X and Y only, I kept Z as 1.0 if not it can’t reflect anything) so it won’t reflect the wall where you put the mirror on.
  3. Under planar reflection component settings (as @heartlessphil noted) change plane fade start and plane fade end to 10. As long as the scale Z of mirror is 1.0 it can still reflect anything. bump up screen percentage to 100 to get a clearer reflection. I think turning Reflection Capture Resolution to 1024 in Project Settings → Rendering also helps a bit.

i m still trying to tweak more to get a clearer reflection…lowering normal distorting strength etc…kind of acceptable but can be clearer.