1. Let's start off by creating a 500x500 document, preferably with a white background. To begin, make sure that your colors are at their defaults (Black + White) (D).
2. Go to Filter > Render > Clouds, then Filter > Render > Difference Clouds.
3. Next go up to Image > Adustments > Invert.
4. Then you want to go to Image > Adjustments > Levels and slide the middle arrow completely to the right.
5. You should have something like this so far.
6. Duplicate your layer and set it to "Color Dodge".
7. Create a new layer and select the color "#790000", you can play around with other colors, but this is just one that we're using for this. Fill the layer with the chose color and set it the layer to "Soft Light".
8. Switch to your first, original layer. Go to Filters > Render > Lens Flare. On this layer you will be placing simple Lens Flares to give the sense of it giving off light. When doing this, you will want to attempt to place the flare on large spots of white, as shown in the given pic. You will need to have the flare set to the "105mm Prime" lens type and 100% Brightness.
9. Keep repeating step 8 until you feel that you've gotten enough on there to suit your needs.
- Architectural lights
- Smoke Effect
- Power Blast
- Vista aero wallpaper