Using the Unlit Transparent Colored shader for my UISprites, will the resulting frame have an alpha channel or will it just be flat blended RGB? For example, when I try to get the source of the camera rendering a UISprite in OnRenderImage and use a shader to render its alpha channel to its red channel the whole screen appears red, suggesting that there is no alpha channel at that point. I looked at the shader itself but I don't know much about how ShaderLab works, just frag/vert so I would appreciate the help.
