🕶️ A view of its UI (taken from the site, on a dark theme) with a scene being displayed on the main part (a small blue toy robot in a cluttered scene reminiscent of an attic, and a small white sphere representing the lighting with its vectors illustrating the rays of light), the graph of the scene in the window below (‘Graph Editor’ tab) and 2 other parameter-setting windows on the right-hand side. 📚️ Gaffer is a libre, multiplatform, flexible, node-based VFX tool that allows image developers, lighting designers and compositors to easily design, adjust, iterate and render compelling 3D or 2D scenes. In particular, it allows users to design and modify scenes of arbitrary complexity by performing numerous operations non-destructively, and to build advanced shaders (via node plug-ins combined with standard Arnold, Cycles, 3Delight and Tractor shaders, and its Open Shading Language or Python). Logic, filters and expressions can be used to create scalable node networks for automated and responsive VFX solutions.