Merge Types

MERGE_NORMAL
MERGE_MULTIPLY
MERGE_SCREEN
MERGE_DARKEN
MERGE_LIGHTEN
MERGE_DIFFERENCE
MERGE_NEGATION
MERGE_EXCLUSIO
MERGE_OVERLAY
MERGE_HARD_LIGHT
MERGE_SOFT_LIGHT
MERGE_DODGE
MERGE_BURN
MERGE_REFLECT
MERGE_GLOW
MERGE_ADD
MERGE_SUBTRACT
MERGE_COLOR
MERGE_HARD_COLOR
MERGE_HSL_HUE
MERGE_HSL_SAT
MERGE_HSL_LUM
MERGE_HSL_COLOR
MERGE_TEXTURIZE
MERGE_TEXTURIZE2
MERGE_TEXTURIZE3