How to create set of glass stairs

• Make a 3d selection where you want the glass to be. Hit f3 and make the material glass.

• Visualise the steps, think what bits of the block you want to take away, how long you want the steps to be etc.

• Set your selection size to what you think is necessary (G and scroll)

• Move the side of the steps, and on one side mark out with a selection, the region you want to remove.

• Fly to the other side of your block and RIGHT click on that side, inside the selection you made on the other side. Press backspace.

• Continue, until you remove all the bits you need.

• All done!