Refer to the article Impact 2019 R2 Graphics Handling Improvements.
Impact 2019 at maximum quality – Custom @ 150 DPI (5,812 x 5,897 pixels) + High quality 3D textures
Impact 2019 R2 – Custom quality artwork @ 300 DPI (13,262 x 3,062 pixels) + Unlimited quality 3D textures
See also: Graphics, Graphics Tools