Question by unity_EXk97a9ts_Bz9Q · Feb 24, 2018 at 02:58 AM · shader rendering background

How to add color (with opacity) on the whole screen at the beginning of every frame (2d)

it's like at the beginning of every frame (2d). The camera is set to "don't clear"

1) first, render the whole screen with a color (for example red color with opacity 0.5)

2) then, render other objects.

Thanks

I've tried to attach a script to the camera, but it doesn't work. The camera draws a solid red color (opacity 1.0) on every frame

 private void OnPreRender()
     {
         GL.Clear(false, true, new Vector4(1, 0, 0, 0.1f)); 
     }

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meat5000 ♦ · Feb 24, 2018 at 05:21 AM 0

Like some kind of Epilepsy Simulator? Sounds fun. Have you tried 0.5 in your Vector4 ins$$anonymous$$d of 1? Does 1 even work and not throw you some error? (1.0f) You say Background but also say Whole screen. You may need to clarify. Background can be handled via the camera and Whole Screen may need Image Effects or a hacky plane placed by the near clipping plane (expensive transparency). Perhaps enable the depth field and specify a value. Perhaps its simply falling short?

In most other situations, some camera is drawing something somewhere, and probably is clearing already with the background color of the skybox (GL.Clear) - $$anonymous$$gests change the skybox.