How to change vertex editing points in Create Form to not bend/curve

[takacosu]

Greetings,
Im trying to create a shape with sharp flat surfaces in create form but after extruding the edge up, the faces bend instead of staying flat. When I go to Vertex editing, I notice that theres many points that I assume is why its curving.
Is there a way to keep the faces flat and not bend/curve?

[TrippyLighting]

You need to crease all edges to get to a fully polygonal look.

[takacosu]

Sorry if its hard to see in the photos but yes, all my edges are creased but it still curves/bends when I extrude the edge

[TrippyLighting]

You can share screencasts and the model if you need more help.

[takacosu]

Here is a screencast it shows the problem a bit better

edit: for some reason my screencast upload is still "pending" so i just attached the video

[TrippyLighting]

NO screencast was embedded.

[takacosu]

yeah it wont let me so i attached my screencast

[TrippyLighting]

Only a triangle by definition is always flat. A rectangular surface can be concave, or convex if care is not taken. 

If you need thee to be always perfectly flat then you need to model this in the Surface (Patch) workspace.

[TrippyLighting]

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@takacosu wrote:

yeah it wont let me so i attached my screencast

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Its easier if you use this free Autodesk Screencast tool

[takacosu]

thanks but what are some contributing factors that determine if a rectangular face will bend? I was able to make this by doing the same thing, except all my faces came out flat and not bent when extruding the edge.
I will try in patch but would like to know more about the cause of the face bending for future reference

 

[TrippyLighting · Accepted solution]

I am not sure this is the best way to explain this. I've modeled with polygon modelers for so long that this is obvious to me. Hopefully the screencast will help some 😉

[takacosu]

Thank you so much! that explains a lot and now i fully understand why it does that instead of just crossing my fingers and hoping it wont happen. 
I appreciate the help!