1. To start things off, rip something up from C4D or another program, so you have a base render. Make sure its a PNG or GIF or a Targa with Alpha Layer capability, trust me, this is crucial to not have a solid black backround on your render, so you get layers.
2. Make a back layer, and make it black. Then, go Layer > new adjustment layer > Color balance. Choose your color (Midtones [Color level 100, 0, -100], Highlights [Color level 100, 100, -100], Shadows [Color level 100, 0, 0]), that will make the image and everything underneath in that color.
3. Take a nice big white brush at 200 pixels or more, turn down the flow, and just outline the image on a new layer behind the image. This makes a nice glow. Fiddle with Blur (Filter | Blur | Gaussian Blur / Radial Blur)
4. Make a new layer on top of the image, and just outline the render again with a smaller brush.
5. Time to touch it up with a brush at least 3 times larger than the small brush you used, and flow it out. Make sure the Color Balance are on the top of all layer. Fiddle with Blur (Filter | Blur | Gaussian Blur / Radial Blur)
This is quite sloppy, make sure you put more effort into it. Continue on, if the image is darker, than normally don't brush too hard, so it will not looks too bright.
Make a new layer above Background Layer (Dark Layer), Go to Filter | Render | Clouds. Set Blending Option to Linear Light to make a nice background.
P.S - Please keep in mind that this is not my original tutorial, im just remake them with my word a bit. Credit to the Art Maker