Is it possible NOT to "Instance Segmentation Mask" translucent objects?

[gq8549967]

Hi there.
I'm trying to create datasets with translucent objects.
In class segmentation mask case, I was able to control whether or not to mask objects with translucent material in this way.
In the similar way, I'd like to control whether or not to mask such objects in instance segmentation mask case.

I think, in default settings, any translucent objects are masked in instance segmentation.
But I'd like NOT to instance mask almost transparent objects (ex: window glass ...etc).

Are there any ways to control whether or not to mask translucent objects in instance segmentation mask case?

Here are some examples so far.

Not class segmentation mask case (Default settings)

RGB image

CS image

IS image

Class segmentation mask case( by changing opacity mask clip value to zero)
RGB image
Same as above

CS image

IS image

Best regards.
Thank you.