Choosing Images
When choosing images to display in ArtScene, aim to use images whose heights are roughly the same height as the applet. (More precisely, the height of the applet minus your chosen CaptionHeight, but you don't have to be exact about this).

If the images you load are much larger, it will slow down the loading process without gaining anything. If the images are much smaller, the quality of the result will depend on your setting for the LimitImageExpand parameter: if LimitImageExpand is set to Yes, images won't expand as far as they should and some of ArtScene's effect will be lost; if LimitImageExpand is set to No, the images will expand to their maximum-possible dimensions, but this is likely to cause the images to look blocky and pixelated.

If in doubt, it's better to have the images a little larger than necessary.