If you use bitmap images saved in 256–color mode, Windows tries to create an individual color map for the image each time it is realized in ABL. This has the following effects:
The background flashes as the color palette is loaded for each 256–color image, unless the color map is identical to the one previously loaded
Performance degrades
To reduce or eliminate these effects, convert your images from 256 colors to 16 colors or recreate them with 16 colors at a time.
The background flashes as the color palette is loaded for each 256–color image, unless the color map is identical to the one previously loaded