Volumetric Path Tracing Framework (VPT) is a free open-source visualization framework developed in WebGL 2.0. It allows loading raw volumetric data, selection of different rendering techniques and definition of transfer functions (when needed).
The framework was developed as part of Master Thesis of Žiga Lesar. The code is available on GitHub.
A test deploy of the application is available at:
Ž. Lesar, C. Bohak, and M. Marolt, "Real-time interactive platform-agnostic volumetric path tracing in webGL 2.0," Proceeding Web3D '18 Proceedings of the 23rd International ACM Conference on 3D Web Technology, Article No. 7, Poznań, Poland — June 20 - 22, 2018, doi:10.1145/3208806.3208814