Create Bump Map for Berserker@Quake2 using PhotoShop

requires 32-bit TGA (RGB) + Alpha
0.0. texture.tga, texture is the name of the Quake 2 texture
0.1. create a copy of texture.tga, rename it texture_bump.tga
0.2. copy texture.tga (diffuse), paste into Alpha Channel of texture_bump.tga (becomes greyscale in Alpha Channel)

1. draw height map for a diffuse texture
2. put put height map in Alph Channel of diffuse texture

automate the following steps and call it q2-bump
New Action -> q2-bump -> Record

1. click on Channels
2. select all Alpha channel, Copy, De-Select
3. click on Layers
4. Paste, set layer -> Overlay
5. Paste, set layer -> Color Dodge
6. Paste, set layer -> Screen
7. Flatten Image

8. Filter -> nVidia Tools -> NormalMapFilter...
9. use these settings - 4 sample, Min Z 0, Scale 5, Ambient Light, Average RGB, Alpha Field Unchanged, all others blank
10. OK

11. Filter -> Blur -> Gaussian Blur (Radius 1.0) OK

12. Select -> All, Copy, De-Selct
13. Paste
14. Filter -> Blur -> Gaussian Blur (Radius 1.0) OK
15. set layer -> Overlay

16. Select -> All, Copy, De-Selct
17. Paste
18. Filter -> Blur -> Gaussian Blur (Radius 1.0) OK
19. set layer -> Overlay

20. Select -> All, Copy, De-Selct
21. Paste
22. Filter -> Blur -> Gaussian Blur (Radius 1.0) OK
23. set layer -> Overlay

24. Select -> All, Copy, De-Selct
25. Paste
26. Filter -> Blur -> Gaussian Blur (Radius 1.0) OK
27. set layer -> Overlay

28. Flatten Image
29. Stop Recordin

30. Open corresponding texture_bump.tga
31. click on Layer, if not already in Layer Mode
32. click on newly created Bump Map Image
33. selectall, Copy, close without saving

34. click on texture_bump.tga, Paste
35. Flatten Image
36. Close and Save