I would like to take an irregular shape and extrude it up. I would then like to apply a different finish to the top/bottom faces to the side faces. For example glossy on top and matt on the sides. When I apply the subdivision surface on my object (after Edge Split) I get some artifacts. Either the top surface edge becomes jagged, or I get a surface artifact. Does anyone know a smarter approach to moddeling something like this? Or how to solve my issue? I'm mainly a Nurb/Solid modeller, I'm using Blender to try and build out my skills in organic shapes so I'm still nooby.
After moonboots comment I feel I wasn't clear on my design intent. Moonboots suggestion could work for some people but not in my instance.
Attempt 2 - To illustrate, I made a sketch in Fusion360 hit the Extrude command and exported that as an STL. The reason I'm trying to learn Blender is that this workflow is quick and works for me in some instances but it produces bad topography. So in Blender, I basically wanted to freehand draw a loop and extrude the fella. Fill the top and bottom surfaces. So I googled some more on Bezier curves and found how to use the Draw tool to freehand a curve, convert it to a mesh, extrude the Edges (not the vertices like the first time I tried). Select the top Edge Loop (Alt left click) which then gives me an option to fill the loop with a face (as opposed to a Grid Fill which produces problems). Now I can Shade Smooth the sides, and Edge Split the top edge, now my problem is that the top Edge Loop Face is now jagged. Is this fixable? When I - Add Modifier - Subdivision Surface, I can't work out why I get these tiger lines. My ultimate goal is to apply one shade to the top face and another shade to the side walls. Any tips, or help much appreciated.