Sorry to bring up the old, but I am an English major and just like to flex my editorial muscle sometimes. Anonymous is wrong on some of his corrections. Let's take a look, shall we?
Welcome to the 3D world. This world was created by an unknown source of energy, which has been converted to a materialized 3D enviorment.Recognize that much? Well:
"Welcome to 3D world. This world was created by an unknown source of energy, which was converted into a 3D enviorment."
I know what you meant by including "Materialized", but isn't that what a 3D enviorment is?
This one is mostly correct, but he should have also noted the spelling. If you are going to correct someone's English, you pretty much have to correct it all. That mistake of not correcting that spelling error cost you valuable credibility.
Also, you removed "the" which was unnecessary and incorrect. It makes the sentence improper.
This should be correct: "Welcome to the 3D world. This world was created by an unknown source of energy, which was converted into a 3D environment."
The world's lifeforms have been created the same way. Here's sphere, our main character of this comic.Okay, this is in present tense. Forgivable. Sort of.
"The world's lifeforms were created the same way. Here's Sphere, the comic's main character."
... And you shouldn't have broken the fourth wall by writing "Comic", but I'm just checking grammar.
Here Anon is very astute in your use of tense. The lifeforms were created in the past, not in the present, so their creation needs to be referred to in past tense.
Also, breaking the fourth wall is optional. If it's the style of your comic, then it's proper. If it is unintentional then it can break the flow of your comic.
This place is the desert, the largest area in the 3D world. Right on it's center there's the world most famous building: the Arena.Nice.
"This place is a desert. It's the largest area in the world. Right in it's center is the word's most famous building: the Arena."
In this case "the desert" and "a desert" both might appear incorrect, but "the desert" is likely the most prudent choice if it is the only desert. Then it is, indeed, the desert of the world. Using "a desert" implies that the reader cannot figure that out themselves through the scenery. If they cannot then this is, indeed, a proper usage. Otherwise it is improper as it breaks the informative tone by becoming condescending.
Spheres are not the only kind of creature in here. There is a huge variety of geometrical or non-geometrical life-forms, such as the octahedron.Uhh...
"Spheres aren't the only kind of creature in this world. There's a huge variety of geometrical/non-geometrical lifeforms, like the Octahedron."
I just wonder why Anon though this needed correction. It was one of the well written sentences, except for a few minor errors. The "or" between geometrical and non-geometrical should be "and. That's it. The contractions are unnecessary and, honestly, contraction use is not good grammar. I know, I use contractions. I do try to stop myself when I notice, though.
Anon was right in some cases but, as you can see, he was mistaken in others. It is alright, though, as English is one of the most confusing languages. We have eighteen exceptions for every rule. Argh.