Hello,
i was doing a random test for other purposes and i found that the resulting render was quite glichy for this case of two boxes touching on the corner and merged together.
Hello,
yeah, definitively a normal issue.
I bet that it’s because the Box source has duplicate points, when we merge blocks, duplicate points are cleaned so the Normals array need to be computed once again.
Do you reproduce the error with a similar setup but with another source/dataset ?
I reported just because i thought it might be useful for others (know there is an issue). i came across it just playing around to test some things with connectivity filter but it is not something that i do in general, so no idea if it is reproductable with other source/dataset.
ok, I tried few things and it seems that I have right, the issue is caused by the points duplication in the Box source.
As I don’t see why we duplicate it and it forces potential user of this source to recompute a normal array later, I created an issue : https://gitlab.kitware.com/paraview/paraview/-/work_items/23376
thanks for the report 
