I am working on creating a massive precast concrete stair with a rounded nose and slanted riser. I have added a riser that has the correct profile and it looks great until I view it in elevation or cut a section through it. It looks like a precast concrete staie with an extra layer on top which is the thickness of the treads, risers and the riser profile I created. The look that Iam after is a massive precast concrete stair. I have tried to turn off the extra lines in the visibility and graphic over rides but with no luck. I am still stuck with a precast concrete stair that looks like it is built up of several layers of material where I just want a single material...concrete. Is there anyone who has a good trick to achieve this?