YafRay (with Blender integration)

YafRay is not a sculpting tool itself, but an essential open-source rendering engine designed specifically for high-quality output of sculpted models — perfect for artists using Blender or other sculpting applications. Unlike basic renderers, YafRay supports advanced global illumination, caustics, and subsurface scattering crucial for realistic skin, clay, and organic materials. It integrates seamlessly with Blender and preserves sculpt detail through high-resolution ray tracing. Used by indie artists and labs needing publication-quality renders without commercial software. Strong community support and no licensing restrictions make it indispensable for sculptors focused on photorealism.