Transparency of a single tile

[microspace]

Is there a way to set transparency of a single tile inside game loop? I'm building some sort of level constructor and I want to find a way to grey out tiles.

[GideonSam]

set alpha property

 

[microspace]

Thanks for pointing in right direction

        var tile = this.map.getTile(10, 9, this.flour);
        if (tile) {
            tile.alpha = 0.5;
        }

 

[microspace]

But still I can't set opacity on tile inside game loop. Only on level creation.