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  • #19720
Closed
Open
Created Feb 25, 2020 by Andras Lasso@lassoan

Per-cell colored surfaces rendering fails on Intel Iris Plus Graphics

When rendering a mesh with coloring using cell data with Intel Iris Plus Graphics, the surface is rendered with randomly changing colored triangles.

This is confirmed in multiple computers, such as:

  • Surface Laptop 3: Intel Iris Plus Graphics driver date 2019-12-21, version 26.20.100.7641
  • Surface Pro 7 (model 1866): Intel Iris Plus Graphics driver version 26.20.100.7870.

Screen capture video: https://youtu.be/9UzU8FCALNQ Test data: https://1drv.ms/u/s!Arm_AFxB9yqHuroxLpY2DfhNA5ppWQ?e=E21iyv

Additional information:

  • This is reproducible the same way with multiple VTK-based applications that uses OpenGL2 rendering backend, such as ParaView and 3D Slicer.
  • This is not a recent VTK regression, because VTK version about 1-2 years ago has the same issue.
  • The legacy OpenGL backend renders correctly.
  • Rendering works well on other graphics cards.
  • Coloring by point scalars works well.

See discussion at https://discourse.vtk.org/t/rendering-problems-with-per-cell-colored-surfaces-on-surface-7/2698

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