Cody Setchfield, better known online as SMOUSE, has made the Pro version of their Underwater Caustics shader available for free for a limited time. It runs smoothly in both Eevee and Cycles, is user-friendly, and offers extensive control over tint, shape, exposure, animation, waviness, and dispersion.
The latest update also introduces several improvements, including more powerful Light Nodes, an updated node group UI with better panel organization, Wave Animation settings added to all caustic types, and new Asset Library categories for material presets, node groups, and object presets, allowing easy drag-and-drop use in any setup.
