Filled slice

Hi All,

I have a 3D point cloud which represent centroid of spheres and velocity vectors are assigned to each points. I used spherical glyph to visualize the spheres.

A slice was created in predefined height and I would like to create a filled slice to show vertical velocity in predefined height, however the slice is not filled… Is it possible to create filled slice based on a dataset like this?

My 2nd problem is: How can I calculate the average velocity in the sliced plane?

Here are some photos:

Here is an example vtu:
vtu file

Thank you in advance!

mwestphal do you have any suggestion regarding this question?