getPixelColour (x, y);
Gets the colour of the pixel at co-ordinates x, y in the current scene.
This function returns a stack with 3 elements. Each of the elements will be a number between 0 and 255 inclusive - the first representing how much red there is in the colour, the second how much green and the third how much blue.
NB: Because SLUDGE may scale the displayed image, these values may not match up exactly with the numbers you used to colour the pixel.
SLUDGE and this SLUDGE documentation are copyright Hungry Software and contributors 2000-2012