Processing point() looks too light

[Doug Blank]

This code produces a window where the pixels appear lighter than the next version:

from Processing import *

window(600, 100)

xnoise = 0
ynoise = 0
inc = 0.04

for y in range(int(height())):
    for x in range(int(width())):
        gray = noise(xnoise, ynoise) * 255
        stroke(gray)
        point(x,y)
        xnoise += inc
    xnoise = 0
    ynoise += inc

from Processing import *

window(600, 100)

xnoise = 0
ynoise = 0
inc = 0.04
immediateMode(False)
loadPixels()

for y in range(int(height())):
    for x in range(int(width())):
        gray = noise(xnoise, ynoise) * 255
        setPixel(x,y, gray, gray, gray)
        xnoise += inc
    xnoise = 0
    ynoise += inc

updatePixels()
redraw()