Mesh showing jagged edges when applying subdivision surface Modifier

I am pretty new to Blender and am trying to model a Cassowary (large bird). Keeping in mind to keep all faces with 4 edges. My model shows jagged edges at the tip of the beak and on top of its head (or cask) when the subdivision surface is applied to 2 (view) but cant work out why. Also my edge loops seem to stop short of there also which I’m guessing is related. I’m hoping someone can save me from more frustrating hours of searching with a solution ?? Thankyou in advance. I have attached the file

Attachments

CASSOWARY6eyes.blend (967 KB)

You have several big ngons (faces with more than 4 vertices) overlapping with other faces , it’s what is responsible of the wrong shading as it makes Blender unable to detect which are exterior and interior faces and assign the correct normals.

An example of one of those overlapping ngons :
http://i.imgur.com/46k1F2u.jpg

Additionally, you have scaled your object at some point in Object mode and have not applied this transformation, while you can have some reason to do so, unapplied object mode transformation can lead into some edit mode tools to not working right.

To apply your object mode rotation/scaling , select the object (in object mode) and press CTRL+A -> Rotation&Scale

I fixed the overlapping faces and ngons problems in case you have trouble to find the overlapping faces , but i have not applied the rotation/scale in object mode i case you have a reason for letting them be (so you can apply them yourself in case they should be applied)

(edit : forgot the overlap from the crest, fixed that too)

Attachments

CASSOWARY6eyesfix2.blend (217 KB)

Thankyou Thankyou, that is very helpful. I saw the larger faces but didnt realise I had overlapped other faces, it makes sense now. Also wasnt aware of the object mode rotation/scaling either. Thanks again I can have my life back now :slight_smile:

Sorry, just one quick question - how could you tell about the object mode rotation/ scaling?

Thankyou Thankyou, that is very helpful. I saw the larger faces but didnt realise I had overlapped other faces, it makes sense now. Also wasnt aware of the object mode rotation/scaling either. Thanks again I can have my life back now :slight_smile:

Sorry, just one quick question - how could you tell about the object mode rotation/ scaling?

In Object Mode, press N and look there :

If the scaling and rotations that were made in Object mode are applied, the values will always be 0/0/0 for the rotations and 1/1/1 for the scales.
If the values are different, it means either scaling or rotation made in object mode were not applied.

(note : scaling and rotation made in Edit mode are not a problem and do not require to be applied)

I understand, Thankyou so much :slight_smile: