@ruff nice! It's similar to my caves view (pic already posted), where solid rock is see-through.
I have not needed to limit the starting point - the code is already fast starting from the very top - so no slices right now.
@dcz You can make solid stone transparent by adding alpha component to colors.txt for the stone block but the view is awkward so i don't use it much.
@ruff Yeah, that's obviously awkward, so my solution is to make some stone transparent and some not. Best check it out yourself.
@dcz here's sample of layer -40