v.+= v.+= accumulates input pixel values. v.+= accumulates input pixel values. The accumulators are the same component size as the incoming streams and the result is clipped to the maximum value expressible by that component size, so in most cases it is desirable to use a v.float32 or v.int32 prior to the v.+= in order to have accumulated sums of larger values.	from the library : softVNS Format : External Environment : jitter / max commercial Max 4.x http://homepage.mac.com/davidrokeby/softVNS.html