Top Layer is a Blender add-on that applies procedural dirt, rust, and liquid layers to objects without requiring UV unwrapping. The tool uses procedural shaders, providing resolution-independent effects that blend non-destructively with existing materials. It includes multi-object support to automatically distribute unique splatter effects across environments or debris fields.

Users can manage layers directly from a dedicated panel, with options to add, delete, or organize them by material or object. The tool supports both Cycles and EEVEE render engines and utilizes vertex paint for precise masking and transparency control. It relies on object normals to calculate the realistic directionality of the generated wear and tear.