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Graphics.Blit to RenderTexture. Impossible to produce a RenderTexture with alpha?

Discussion in 'General Graphics' started by Void24, Jan 30, 2015.

  1. Void24

    Void24

    Joined:
    Oct 15, 2013
    Posts:
    50
    I have tried every combination of shader blending, texture formats, and ColorMask A..

    I can not get a RenderTexture to have anything other than a purely solid alpha channel. Is this even possible?

    Can a RenderTexture's alpha component be altered through Graphics.Blit?
     
    Void24, Jan 30, 2015
    #1

  2. Void24

    Void24

    Joined:
    Oct 15, 2013
    Posts:
    50
    Question still stands, but as I have done more experimenting, I should correct it.

    I rewrote my shader as a vert/frag shader, and got alpha working! So the problem is in the surface shader workflow.

    The question should now read:
    Surface shader blitted to RenderTexture. Impossible to produce a RenderTexture with alpha using a surface shader?
     
    Void24, Jan 30, 2015
    #2

  3. boundingbox

    boundingbox

    Joined:
    Mar 31, 2013
    Posts:
    30
    I am using a vert frag shader and I am cannot get it to write to the alpha channel, how are you getting it to work?
     
    boundingbox, Mar 6, 2015
    #3