I just started modeling and using blender this week so I’m probably as noob as it gets.
I’m working on a glass model right now that requires hard edges indented into the curve of the glass. At first I couldn’t get the edges to remain sharp after smoothing. I tried the edge split modifier with no success. Finally SHIFT E + 1 worked perfectly on the selected edges except some edges now show this weird dark gradient splotch that also shows up even in the final render. I have no idea why this is happening. The edges look exactly how I want them to, it’s just those dark splotches are quite bothersome.
You can see the problem on the triangle indentations between the indented diamonds. The diamonds are fine, but the bases of the triangles (even the upside-down ones) show a dark gradient moving upwards briefly.