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I'm trying to make a PNG Rain animation with Alpha Channel and then i need to import that into another software, the thing is that i created a glass material in order to give the water-drops a kind of transparent texture, and it works on the preview of the material, the thing is that it needs light (any lamp) to work, but on this case i do not want to add any light since i need it almost as a plain illumination, is it possible to make the material work without light? like an Emission material but with this glass material?

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Image Reference (without the background)

enter image description here

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  • $\begingroup$ Could you find a reference image that look like what you want? I'm not sure I understand the difference between lamp light reflected from a material, vs light emitted from the material itself. $\endgroup$
    – ajwood
    Feb 13, 2015 at 14:01
  • $\begingroup$ Something like this (without the background) wallhud.com/download?filename=2014/12/… $\endgroup$
    – beavoru
    Feb 13, 2015 at 14:03
  • $\begingroup$ maybe an environement texture mapped as reflection with transparency on the drop objects for a fake refraction/reflection effect $\endgroup$
    – Bithur
    Feb 13, 2015 at 14:32
  • $\begingroup$ How can i hide the enviroment so it doesnt appear on the Render? $\endgroup$
    – beavoru
    Feb 13, 2015 at 15:21
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    $\begingroup$ @beavoru or check film "transparent" option in render settings $\endgroup$
    – Bithur
    Feb 13, 2015 at 15:30

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Set the background material to white or light grey in enviroment. Turn on ambient inclusion in enviroment settings. Set film to transparent in render settings.

That said, without a directional light you won't get shadows or reflection that make it look like rain. So you might want to add a light, use an image or movie in the background that the rain could reflect, or set up a light that only throws shadows and place it directly above your rain.

Andrew price did a great tutorial that included rain on the camera, if you have any other issues you might want to check it out on blenderguru.com

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