[Jeff]

Here's an example that uses the viztask.waitCall command to call effect.setBulge and waits until the vizact.mix parameters are complete.

import viz
import vizact
import viztask

viz.go()
viz.addChild('gallery.osgb')

import vizfx.postprocess
from vizfx.postprocess.distort import BulgeEffect
effect = BulgeEffect(0,radius=1)
vizfx.postprocess.addEffect(effect)

def BulgeTask():
	
	increase = vizact.mix(-0.5,0.5,time=2)
	decrease = vizact.mix(0.5,-0.5,time=2)

	while True:

		yield viztask.waitCall(effect.setBulge,increase)
		yield viztask.waitCall(effect.setBulge,decrease)

viztask.schedule( BulgeTask() )