Fix for plotting model with multi-group cross sections#3748

Merged

GuySten merged 6 commits intoopenmc-dev:developfrom

GuySten:mg-plot

Jan 30, 2026

Commits on Jan 22, 2026

Commits on Jan 29, 2026

Remove Material.cross_sections, simplify test_mg_plot
paulromano
committed
fix test to use mg materials and fix mg xs lookup if path is relative
GuySten
committed

Commits on Jan 30, 2026