Transparent blocks produce very very marked dark shadows; render it rather strange since the windows are supposed to let the light enter inside (this is how mine works in any case). It's even more strange with forcefield blocks which are supposed to produce light and actually produce light and shade at the same time (it's quite paradoxical).
In the best case, the shadows from tinted glasses should produce colored shadows associated with these tints on surface.
Failing to implement this solution, the shadows from the glasses should be at least mitigated (maybe 25% of the actual shadow mark ?).
Concerning force fields, I think they just shouldn't produce shadows at all.
Here a gif where I activate a yellow forcefield block that make a dark black shadow ray on the structure below.
{F6228}
Here a pink glass block and it's shadow and its shadow in my opinion far too visible.
{F6243}