this program is ideal if you want to pack individual grayscale textures in one image.
- Open ChannelPacking.exe
- Click load under the color channel into which you want to insert texture.
- The Windows dialog appears. Select the texture and click open.
- Repeat for other textures. Empty channels will be black (the alpha channel will not be added).
- When you are done click save.
- The Windows dialog appears. Enter a file name and click save.
You now have textures packed.