Direct coloring is a replacement for the traditional fractal coloring technique used for ordinary flame fractals. A direct coloring variation type implements its own coloring algorithm. To date, most direct coloring variations produce rainbow stripes on the fractal.

You have control over the amount of direct coloring versus traditional coloring to apply to a render. (See below)

Direct Coloring Variation Types

You can create your own variation set with direct coloring variation types in it. There are 15 variation types that support direct coloring.

Direct color parameter - Triangle Editor

Each transform in the fractal has a Direct Color parameter which affects the amount of direct coloring to apply. Its range is between 0.0 and 1.0. When 0, no direct coloring and full traditional coloring is applied to that transform. When 1, full direct coloring and no traditional coloring is applied to that transform.

The Direct Color parameter has no affect on non-direct color variations.

This is the same fractal with 2 variation types: linear and julian2dc (has direct color support). When the Direct Color parameter is set to 1, you can see the candy striped affect on the fractal. When the Direct Color parameter is set to 0, it is colored as a traditionally colored fractal.