I'm having an issue with the Steam version of GTA VC. Over time when being in-game the map seems to deteriorate:
This gets progressively worse till the point of complete unplayability. I've been trying to fix this by changing compatibility mode to 98/ME and updating my drivers. None of these fixes work and I can't seem to find someone who has similar problems. Strangely, GTA 3 has none of these problems.
CPU: AMD FX 6300 6-Core
GPU: AMD Radeon HD 7950 4GB V-RAM
RAM: 16 GB
OS: Windows 7 64x Ultimate