There are 4 Render Modes:

• Standard
• Transparent
• Composite over Color
• Composite over Background Image

These render modes are available all throughout the app.

These are all composited inside the Fractal Architect app. The radial gradient background images were created with the Acorn app.

You can use the Transparent render mode to create images suitable for compositing in another app like Photoshop.

First fractal is a standard render. Next one is composited over white color.