how can I use both Color and Alpha for the ColorRamp How can I use both the Color and Alpha from the ColorRamp node so that the material output uses the color and becomes transparent?
I tried inserting a Mix Shader and connecting the ColorRamp alpha to that but it didn't work.. 
Thanks :)
To have the alpha properly control the transparency of the volume you need to multiply it into the density before plugging it into the strength of the emission shader.


Click to enlarge