VTK

VTK (Visualization Toolkit) is a classic data format in scientific computing and medical visualization. It supports structured grids, unstructured grids, and image data, and is widely used for visualizing fluid simulation, medical imaging (CT/MRI), and engineering analysis results.

VTK is oriented toward scientific data rather than artistic assets. It records field data and topology, so entering a game or Web rendering pipeline requires conversion to a general mesh. Scalar/vector attributes are lost during conversion, so it is recommended to keep the original VTK files.