HI Damir ,
I am not sure I fully understand what you are asking but there are hot keys for showing and hiding parts.
CTRL+H will hide what ever part is selected and CTRL+SHIFT+U will unhide any hidden components.
if it is a visibility thing from SOLIDWORKS that is coming into visualize with no opacity then that is probably easier to tackle in SOLIDWORKS and save out a copy of the assembly with no hidden parts in it, or Select all the Suppressed/Hidden parts and make then visible so you can see then when in visualize.
ctrl+shift+U unhides everything or just stuff that moves is over?
I didn't know about that. I'll test it tomorrow