The same case, why the VTK shows different result?

hello everyone:
I use mfix-22.1 in windows10. And i build two case with the same parameters, but the vtk seems the different result. Especially, the diameter is the same in both cases, but the results seems one bigger and the one smaller (the mapper both point gussian)?
so, i want to know, is there any parameters have the effect of VTK result? or the vtk just rescale the mapper automaticly?

Did you save the particle diameter in the vtk file? The GUI looks for the diameter to scale the point gaussian shader.

Ok, Thanks, the particle diameter is constant in the case , so i didn’t save the diameter data in the vtk file.
maybe this is the problem.