Quite an existential question. All but the most extreme such efforts leverage some code from another source. Few people write bare-metal software renderers. I'v

Quite an existential question. All but the most extreme such efforts leverage some code from another source. Few people write bare-metal software renderers. I've been mulling over this philosophical question since the days of "demo" code on the IBM 5150 (the quintessential original "PC") using BIOS calls to draw pixels. If you can use BIOS, X11, GPUs, etc then where's the line prohibiting use of Unreal 4?