The modding community has achieved a significant breakthrough by enabling gamers to use AMD’s FSR 4 scaling technology in games where it isn’t officially supported. Thanks to the OptiScaler tool, originally designed to replace upscalers, enthusiasts have successfully integrated FSR 4 into titles that rely on DLSS 2/3 or Intel XeSS. This development is particularly beneficial for owners of the latest Radeon RX 9000 (RDNA 4) GPUs, who previously could only utilize FSR 4 in 35 supported titles.

OptiScaler acts as a “bridge” between technologies, replacing DLSS or XeSS files with FSR 4, thereby automatically adding support for the latter. The utility also experimentally introduces frame generation and Anti-Lag functionality via NVIDIA Reflex, expanding its capabilities beyond simple upscaling. For instance, in Cyberpunk 2077, where developers opted not to update FSR to version 3.1, modders have already demonstrated FSR 4 in action, showcasing improved detail and image stability.

Despite its potential, OptiScaler remains an unstable solution. Windows 10 users frequently encounter crashes and errors when launching modified games. Additionally, the tool requires deep file modifications, which may trigger anti-cheat systems in multiplayer titles. Developers warn that the list of compatible games is growing gradually, and some projects simply refuse to launch.

Main image: cowcotland.com 

Comment on this