PD Artist 2 is PD Howler (PD Pro 6), but without the animation tools. The result: a lean, mean painting machine! It is built on the same howling-fast core engine as the one used in PD Pro 6 (AKA PD Howler) and thus benefits from interface improvements, multithreading, SSE2, speed enhancements and other optimizations. Some animated filters were removed. Some filters that had animation options were modified to exclude the animated portion.
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Source and original article: thebest3d.com