To provide additional "keyframe" points information for particle's color, glow, alpha, scale, and emission*.
PSYS_PART_MID_* can have many of the same variable type in the list and ends when it detected an integer type in that list's item.
Ex:
[PSYS_PART_START_COLOR, <1,0,0>,
PSYS_PART_MID_COLOR, <1,1,0>, <0,1,0>, <0,1,1>,
PSYS_PART_END_COLOR, <0,0,1>]
[PSYS_PART_START_GLOW, 1.0,
PSYS_PART_MID_GLOW, 0.5, 1.0, 0.2, 1.0, 0.75, 1.0, 0.4, 1.0,
PSYS_PART_END_GLOW, 0.0,
PSYS_PART_START_EMISSION, 1.0,
PSYS_PART_MID_EMISSION, 0.5, 1.0, 0.2, 1.0, 0.75, 1.0, 0.4, 1.0,
PSYS_PART_END_EMISSION, 0.0]
[PSYS_PART_START_SCALE, <0.1,0.1,0.0>,
PSYS_PART_MID_SCALE, <0.3,0.3,0.0>,
PSYS_PART_END_SCALE, <0.0,0.0,0.0>]
[PSYS_PART_START_ALPHA, 0.1,
PSYS_PART_MID_ALPHA, 0.7, 0.3, 0.0,
PSYS_PART_END_SCALE, 0.1]