Scene explorer not rendering texture until interaction

[xavArtley]

Hello,

I'm working on a widget to render vtk scene in jupyter notebook.
It's based on the SceneExplorer using .vtkjs files
However when loading a .vtkjs with texture the later does not appear unless an interaction is done : holoviz/panel#355

I can reproduce this issue with the scene exporer of vtk-js website

[jourdain]

I think we fixed it.