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Message: [QUOTE="Roedy Green, post: 567473"] You only required in your paint or paintComponent method to draw the part inside the clipBounds You can draw just that part of the model from scratch each time paint is called. Then you only have the vector storage, which does not get bigger when you magnify. If you want to get very clever, you can predraw tiles, and cache them, only redrawing tiles as needed. If you want to get very fancy, you do your redrawing in the background, preemptively guessing which tiles you will need next. see [URL]http://mindprod.com/jgloss/repaint.html[/URL] for more details. [/QUOTE]