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The transparent texture enter image description here

Rendering result enter image description here

Material setup

ImageTexture [Color] ------- TransparentBSDF --------|
                |                                    |---- MixShader-----SurfaceOutput
                |---------------DiffuseBSDF----------|      [Frac]
             [Alpha]-------------------------------------------|

It seems the dark edges come from nowhere...

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  • $\begingroup$ That way the fog turns into air and the air turns into fog, but the dark edges still exist. btw, I used gimp's eraser to clean up the boundary so that they appear more natural. Was I doing it right? Will the eraser remove the alpha value as well? But the strange thing is this image still appear to be transparent when I open it in photo viewer. $\endgroup$ – Davis Jul 17 '17 at 22:25
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Switch the order for diffuse and transparent

enter image description here

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  • $\begingroup$ Thanks. I figured it out. I shouldn't plug the color output to the input of the transparent BSDF $\endgroup$ – Davis Jul 17 '17 at 22:28

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