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Importing a 'smoke' image as a plane shows no transparency. Still have black background.

enter image description here

What other settings should I tweak?

enter image description here

Lester Karaive Rodriguez
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  • Did you try premultiplied alpha? Not sure if it would fix, just a thought. I can import images with alpha just fine in Blender Internal right out of the box, I think it works for Cycles for me too. – J Sargent Apr 18 '18 at 00:43
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    Does your image really have an alpha channel? What format is the image in? –  Apr 18 '18 at 01:06
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    Make sure that your image is in png format and not in jpg because jpg does not support alpha channel. Make sure that the graphic application you used to create the image can generate the alpha channel because many graphical apps cannot do it correctly like in windows 10 or others.. – Yves Bodson Apr 18 '18 at 04:58
  • @VRM I will try it again with premulti alpha. Have no idea how to use it though. – Lester Karaive Rodriguez Apr 19 '18 at 02:31
  • @cegaton I read and experimented with the answer from /27633/. The image is in png. Problem is can't find where is the alpha channel. – Lester Karaive Rodriguez Apr 19 '18 at 02:40
  • @Yves Bodson It's a youtube tutorial download pic that uses a jpg but using png instead. At least I know that alpha channel not detected or not there. – Lester Karaive Rodriguez Apr 19 '18 at 02:47
  • The image you uploaded has no alpha channel https://i.stack.imgur.com/AdUWj.gif. Read section 2 on this answer: https://blender.stackexchange.com/questions/27633/image-alpha-background-renders-black-when-using-import-images-as-planes –  Apr 21 '18 at 15:32

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The image you uploaded contains no alpha channel.

You can check the alpha channel for the image using the channel display switches at the bottom of the UV/Image editor window

enter image description here

Blender will not magically create an alpha channel for you, if the image contains none.

A half-ass solution (without getting into editing in an image editing app, or sourcing an image with a proper alpha channel), is to use the black and white representation of the image itself as a mask to control the mix between an emission and a transparent shader, so that the white pixels of the image will be emissive and the black ones transparent.

enter image description here

  • Issue solved with the illustrations provided. Simple set of nodes does the trick. The only thing missing was that in Render->Film the Transparent option needs to be ticked. Millions thanks – Lester Karaive Rodriguez Apr 23 '18 at 23:43