Spiral Shell 3D Dashboard Spiral shell3D approximation from your photo Interactive 3D shell model. Interactive 3D shell model. Opening Back Side Top Drag to turn · Scroll or pinch to zoom Reference photo View Turn0° Tilt0° Zoom100% Shape Shell width100% Spire height100% Canal length100% Opening width100% Surface ridges100% Show mesh edges Relative dimensions · Unseen surfaces and interior are inferred.