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Looking Glass B7 is an open-source KVMFR (KVM FrameRelay) solution engineered to deliver near-native, extremely low-latency graphics performance for virtual machines that employ VGA PCI passthrough. Designed for enthusiasts, gamers, and professionals who run Windows or Linux guests under QEMU/KVM, the software establishes a high-speed shared-memory channel between the guest GPU and the host, allowing rendered frames to be relayed to the host display without the overhead of network streaming or USB-capture hardware. Typical deployments pair a dedicated secondary graphics card assigned via VFIO with a lightweight host system, enabling demanding use cases such as high-FPS gaming, 3-D rendering, CAD work, and color-accurate video playback inside a VM while preserving the security and snapshot capabilities of the virtualized environment. Because the relay operates at the frame-buffer level, Looking Glass also supports seamless keyboard-mouse integration and optional audio forwarding, making it a practical alternative to dual-boot setups. The single-version release B7 incorporates performance fixes, improved cursor handling, and broader host compositor compatibility, consolidating earlier alpha milestones into a stable, community-tested build. The project is catalogued under the virtualization subcategory of system utilities and is distributed under the GPL-2.0 license. Looking Glass is available for free on get.nero.com, with downloads provided via trusted Windows package sources (e.g. winget), always delivering the latest version, and supporting batch installation of multiple applications.
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