Studio of ARMA 3 says they have to make their own engine beacause the other engines don't give what arma 4 needs, can someone explain?

[rufreakde]

@poky @Raja.Haris

64-bit Coordinate System

Unreal Engine has been a 64-bit application for a while. 64-bit means that a memory address is 64-bit (8-byte) large . When a program is 64-bit and is on a 64-bit system, it can use more memory. 32-bit applications cap out at 4GB. This has nothing to do with the floating-point precision size. Unreal Engine uses the float type, which is 32-bit. Changing the floating-point type from float to double (64-bit) would be quite the challenge, and would make stored coordinates take up double the memory. …

So it seems now UE5 has doubles 64 precision now.