GCN Models Problem

[Sunny Cassette]

Ok, so i'm trying to get maps of Super Mario Sunshine, i extract the ISO of Mario Sunshine, i put the ''.szs'' file in ''yaz0dec'' and the ''.rarc'' file in ''rarcdump'' and then i can open in it in BMDView2 and export it as a ''.3DS'' file with the textures, at that point everything is ok, but now is when the problem comes, i have been exporting many Super Mario Sunshine maps and i noticed that they have differents sizes... why? Some maps are bigger than others and its a real mess cause i want them to the original size for my personal uses, someone knows why happens that or if i can get the maps with normal sizes?

PD. I look that problem happens with Mario Kart DD too, and the rips that are here have that problem...