Maya: Paint Effects

gistfile1.py

import pymel.core as pm
import maya.mel as mel

for node in pm.ls(type='stroke'):
    cmd = 'applyPresetToNode "%s" "" "" "ghost" 1;' % node
    mel.eval(cmd)

for node in pm.ls(type='brush'):
    cmd = 'applyPresetToNode "%s" "" "" "ghost" 1;' % node
    mel.eval(cmd)

import random

for node in pm.ls(type='brush'):
    node.gapSize.set(random.uniform(0.1, 0.5))
    node.gapSpacing.set(random.uniform(0.5, 1.0))
    node.gapRand.set(random.uniform(0.1, 0.5))