Looking Glass

Looking Glass is a software publisher that focuses on ultra-low latency virtualization solutions, delivering a single but highly specialized application designed for users who run virtualized gaming, workstation, or content-creation environments. The company’s flagship product, Looking Glass, implements the KVM FrameRelay (KVMFR) protocol to stream the framebuffer of a GPU that has been passed through to a guest operating system with virtually no perceptible delay. This approach allows a Linux host to display the guest’s accelerated graphics in a native window, eliminating the need for a second physical monitor, keyboard, or mouse and thereby simplifying multi-OS workflows that demand bare-metal GPU performance. Typical use cases include enthusiasts who game on a Windows guest while maintaining a Linux desktop, developers who test 3D applications across platforms on one machine, and professionals who isolate creative suites inside a VM for security or snapshot convenience. By combining shared-memory techniques with tight synchronization, the software achieves frame-times measured in microseconds, making it suitable for competitive gaming or color-critical video playback. Configuration utilities and diagnostic clients are bundled to streamline the initial PCI-passthrough setup and to monitor stream health. Looking Glass software is available free of charge on get.nero.com, where downloads are delivered through trusted Windows package sources such as winget, always providing the latest upstream release and supporting batch installation alongside other applications.