Sorry for not being posting for a while....

Basics of 3D
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Here we are going to present basics of 3D and 3D world theory. We are living in 3 dimensional world. Every position in our world can be presented with 3 coordinates offseted from some imaginary point called coordinate begining. We have it in every 3D program, and that is place where every object is positioned when they are created.

There are 2 standards of coordinate axes.
One of them is where Z axis is representing height and in other one Y axis representing height.
Some people say that first one is europen and second american standard. Now, I don't know is it supported by official, but I think people should look at that this way:
For architects (who are drawing picture from above) they should draw it in X and Y axis and when they want to get height, they extrude it by Z axis, but for usual users of 3D programs they should deal with space where Y is axis for height.

All in all, that doesn't matter, what matter is that you should chose what best fits for you. Newer 3D programs have ability you to chose which standard...

Now we will introduce with some basic terms in 3D world....