This is one of over 4720 effects generated by Filter Forge, a Photoshop plugin that allows you to create your own filters.
To open this filter, you must have Filter Forge 2.0 or higher installed on your computer. If you don't have it installed yet, click here to download Filter Forge
OK, so it's not a perfect paint by number filter, but it does give more control than most poster paint filters. Because the poster levels are controlled separately in each color channel, you can vary which colors are posterized more or less than others. This way you can make the poster effect as natural or unnatural as you want. You can make your image kinda look like a paint by number painting or more abstract softer limited pallet image.
paint by number, poster, color control, channels, color levels
This filter has earned its author one of our rewards. They are given to the authors of popular filters and include a free copy of Filter Forge.