Set Smooth Problem

Hello there, I’ve used blender for quite some time now but i’ve been used to box modelling, although lately we’ve been taught about topology and I found that doing plane modelling gets the job done a lot easier.

My problem is, whenever I set smooth my model, a strange crease appears. I don’t know what’s wrong with my mesh. This only happens to me with plane modelling.

(the site won’t let me post a screenshot orz)

Recalculate the face normals. Select all the faces in edit mode, remove any doubles (W / remove doubles) and then Ctrl+N to recalculate the normals.

ah it worked~ thank you so much!

There should almost be a permanent tip section for questions like these. They seem to appear twice a week at times. Same topic, same problem. I wonder if this is just a question of documentation on the Blender.org side, where there really is no official “book” for Blender usage, but just an unfinished Wiki.

There should almost be a permanent tip section for questions like these.

Maybe a “Top 10 Blender Tips” sticky. I picked up on recalculating normals by reading the threads here although it took some digging.