I have pyvista 0.38.1 and sfepy 2022.4, both seem to be the latest releases.
Maybe we can go about it the other way: is there an environment with version numbers known to work? I can try a lock file and see if it helps.

On Thu, Feb 9, 2023 at 8:06 PM Robert Cimrman <cimrman3@ntc.zcu.cz> wrote:
So it is a visualization issue - do you have the latest sfepy release or
earlier? Maybe updating sfepy and pyvista would help.

r.

On 2/9/23 16:57, Yosef Meller wrote:
> three fields. Choosing each one displays the correct result. so at least
> that's a workaround.
>
> On Thu, Feb 9, 2023 at 4:51 PM Robert Cimrman <cimrman3@ntc.zcu.cz> wrote:
>
>> On 2/9/23 15:18, Yosef Meller wrote:
>>>> It might be a pyvista-related issues. Can you try another VTK viewer?
>>>> (e.g.
>>>> vedo, paraview, ...)
>>>>
>>> Paraview gives me only one object in view.
>>>
>>
>> And the button/drop down menu "solid color" shows the three fields or a
>> single one?
>>
>> r.
>>
>