I think there are some thins you could do to upscale it reasonably, but it will definitely be better to redraw the textures if you have time to do it properly.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
