Photoshop
- Optimizing Transparent Graphics on a Patterned Background Part 1 Part 2
- How to optimize transparent graphics on a patterned background.
- Saving Transparent Graphics
- How to save transparent graphics.
- Starting with a Non-tansparent Image
- How to make a transparent image out of an opaque one.
- Simulating Transparency with JPEGs
- Making JPEGs look transparent.