Because those actually aren't each game's own logic, they're features of the console's GPU. They tell the console hardware to use a particular set of fog settings and a projection matrix, and Dolphin's able to just ignore those settings and do its own thing
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT