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Question by Poxet · Nov 24, 2014 at 11:15 PM · shader

Overlapping semi-transparent projectors

I want to show semi-transparent circular areas in my unity3d project. I use a projector for this. My problem is that when the areas overlap, the colour is intensified. I want to have the same colour over the entire area.

alt text

The shader that I use looks like this:

 Shader "Projector/Additive Tinted" {
   Properties {
       _Color ("Main Color", Color) = (1,0.5,0.5,1)      
      _ShadowTex ("Cookie", 2D) = "" { TexGen ObjectLinear }
      _FalloffTex ("FallOff", 2D) = "" { TexGen ObjectLinear }
   }
   Subshader {
      Pass {
         ZWrite off
         Fog { Color (1, 1, 1) }
         Color [_Color]
         ColorMask RGB
         Blend One One
         Offset -1, -1
         SetTexture [_ShadowTex] {
            constantColor [_Color]
            combine texture * constant, ONE - texture
            Matrix [_Projector]
         }
         SetTexture [_FalloffTex] {
            constantColor (0,0,0,0)
            combine previous lerp (texture) constant
            Matrix [_ProjectorClip]
         }
      }
   }
 }

Can this be solved with a different shader, or can ite be done some other way?

projector.jpg (100.7 kB)
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avatar image MrSoad · Nov 24, 2014 at 11:35 PM 0
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Hi, you can have a look at this thread for some possible ideas if you want to :

http://answers.unity3d.com/questions/838265/global-transparency-for-sprite-shader.html

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Answer by DrKyosho · Jan 31, 2016 at 12:55 AM

Change ZWrite to on, I believe that should have the desired effect ;)

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