An example of how to make a colored aura. After coloring the smoke, use 'Filters / Blur / Gaussian Blur' to mistify the smoke.
https://www.youtube.com/watch?v=LRotrAgssYw
Some smoke brushes : https://www.brusheezy.com/free/smoke-gimp
You can also use the online tool to make smoke : http://weavesilk.com. Save the image, color the smoke (as in the video) and then use the blur tool in gimp.
A quick example :
https://www.youtube.com/watch?v=LRotrAgssYw
Some smoke brushes : https://www.brusheezy.com/free/smoke-gimp
You can also use the online tool to make smoke : http://weavesilk.com. Save the image, color the smoke (as in the video) and then use the blur tool in gimp.
A quick example :