public void setBlueLight(double newBlue)
			{
				if (newBlue == baseLightColours[BLUE])
					return;

				int difference = (int) newBlue - baseLightColours[BLUE];

				for (int x = 0; x < width; x++)
					for (int y = 0; y < height; y++)
						lightData[x][y][BLUE] += difference;

				baseLightColours[BLUE] = (int) newBlue;
			}