# \#gpu

**URL:** https://discourse.vtk.org/tag/gpu/54.md

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## [RayCastMapper for SDF](https://discourse.vtk.org/t/raycastmapper-for-sdf/16409)

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**Author:** [@Jens\_Munk\_Hansen](https://discourse.vtk.org/u/Jens_Munk_Hansen)\
**Replies:** 2\
**Last updated:** [May 10, 2026, 8:15pm UTC](https://discourse.vtk.org/t/raycastmapper-for-sdf/16409 "2026-05-10T20:15:35Z")

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Hi Developers We’ve prototyped a single-surface sphere-tracing mapper by forking vtkOpenGLGPUVolumeRayCastMapper. The fork keeps all of the parent’s pipeline plumbing — NDC→texture ray setup, depth-buffer composition, …