i got serious problem with my blender i cannot solve. when im trying to send my models to someone else, half of my model faces are missing. Kaiser says that normals are f****d and looks like he is right, but i got no clue what is wrong (what is funny, even in texture mode in blender these faces are missing, but when i open models with 3dwings everything is ok :D)
- this is view which shows normals, i hope you can see that many faces (like under cannon) dont have... well these blue something.

and i already used recalculate outside and remove doubles (Kaiser suggested its problem with my modeling metod, but i just start circle, extrude edges, merge vertices... and well thats all i use most of the time)

send me a PM with a .obj file and ill try to do something.

On the other hand, be calm and learn some more about 3D modelling, you've just started it.

Flip them manually. Select the faces with wrong facing normals, and press W > Flip Normals.

now i feel quite embarassed i didnt notice this option >> THX !

but now, what causes this ? i cant play with normals every time i make model :X

Probably this:
but i just start circle, extrude edges,merge vertices... and well thats all i use most of the time

thats from tutorials >> and i dont merge every vertice, even these faces i dont touch but just extrude are missing. so no

Normally it doesn't happen, I very rarely have to flip normals manually, automatically facing them outward works 99% of the time. Guess you just got unlucky on your first try.

I'm not sure what exactly makes it break sometime. Could be the shape of the model, or it could be the way it was built.

it happens in every model, equivalent of every face on the other side is broken :/ even if i dont mirror. maybe ill reinstal blender. thx for flip, cant belive i didnt notice it before :D

have you ever tried polygonal modelling?

This happened to me the other day. I can tell you exactly how it happened.

Select right arm.
Mirror it to make a left arm.
Left arm shows in upspring, but is inside out in spring.

Once I flipped normals in blender, it shows inside-out in blender but properly in spring. Which is very annoying.

thanks to whoever helped wombat the other day

i was very relieved to see his model load up properly

Then you are doing something wrong.

Maybe this will help:
Ctrl + N will make blender recalculate all the selected faces' normals so that they face outside. It's more reliable than flipping them.

nice reading comprehension bro

Could you please clarify?

another annoying stuff in blender, when i tried to A+ ctrl n, it didnt work, but when i do A+ deselect 1 face + ctrl n, it usually works (but again, not always).

thx for all help anyway,

first post

well yes, but it didnt work coz i selected all faces, when i deselect few, ctrl + n works <3 blender

Your off-topic insult to a program that you do not prefer offends me, sir. While many people find Blender's learning curve and key-based interface off-putting, it is incredibly powerful.