fix tile display with translucent geometry
Since vtkIceTCompositePass renders to full window irrespective of renderer's viewport, need to make sure that the vtkRenderer's viewport is updated to full size as well, otherwise internal passes like depth peeling can have issues when rendering on tile displays. Fixes #18978 Updating TileDisplaySplitView to test translucent geomtry. Also added support to render larger tiles for better test image comparison.
Showing with 85 additions and 16 deletions