when you crease your meshes you have to work a bit differently from using classic support loops. poles on edges can easily shade poorly, you should always make sure of clean loops/rings on edges otherwise you have these spots jesus why are these images so huge? @@"Eric Chadwick" ^^
lets call it support structure, not necessarily support loops in the sense you would use those when you do not use creases. its just needs a little different thinking about things. you need to keep in mind that the edge quality is dependent on the surrounding geometry, to have consistent looking edge quality you need a…
Use more edge loops, extend the loops down and through the hole instead of looping around the corners, that'll pull out the corners like you're seeing.
This is kinda hard considering the top fins are near the edges of the cylinder, beyond the support loop. I'm not sure how to tackle this. Adding an extra loop would just make the curvature more sharp ?
You don't want to disturb the edge flow or create 5 edge poles along a clean cylinder like that. Try to terminate any loops or edges on the flat surface away from the loop.
@perandall not sure what exactly your question is but I suppose you're talking about pinching artifacts caused by uneven spaced loops ? If so enable loop tools addon under blender preference > select the row of edges you wanna space like this > loop tools > space. You can also add an extra softness by using the relax…