Transparent pieces

[akiradeveloper]

The component has blacklist which is a set of surfaces which will be painted in black.

Instead of this, I want to specify set of pieces to be transparent.

Transparent piece isn't possible with real cube so will be a great value.

To make a piece transparent, we can use so-called alpha brending. But since other pieces aren't transparent. We need to do some graphic technique to see solid piece behind a transparent piece because depth buffer enabled normally eliminated the solid piece when they are drawn front to back.

My idea is firstly draw all solid pieces and then transparent ones.