hello, i am defining the pixels in an PImage like this:

for (int y=0;y<pi.height;y++) {
for (int x=0;x<flower.pi.width;x++) {
  int color = getSomeColor();
  //flower.pi.set(x, y, color);
  flower.pi.pixels[y*flower.pi.width+x] = color;
}
}

unfortunately this doesnt always work. in about 30% of the cases the images is only set halfway down. and the lower part is missing.

as you can see, i tried both, setting the pixels with the set() function and writing directly into the pixels array.