import graph3; 
size(7.5cm,0); 

currentprojection=perspective(100,100,200,up=Y); 
 
draw(extrude("ABC",2Z),red); 

limits(O,10(X+Y+Z));
xaxis3(Label("$x$",1),blue,arrow=Arrow3);
yaxis3(Label("$y$",1),blue,arrow=Arrow3);
zaxis3(Label("$z$",1),blue,arrow=Arrow3);

import graph3; 
size(7.5cm,0); 

currentprojection=perspective(100,100,150); 
 
draw(extrude("ABC",3Z),green); 

limits(O,15X+10Y+15Z);
xaxis3(Label("$x$",1),blue,arrow=Arrow3);
yaxis3(Label("$y$",1),blue,arrow=Arrow3);
zaxis3(Label("$z$",1),blue,arrow=Arrow3);

import graph3; 
size(7.5cm,0); 

currentprojection=perspective(100,100,50); 
 
draw(rotate(90,X)*extrude("ABC",Z),orange); 

limits(O,15X+10Y+7Z);
xaxis3(Label("$x$",1),blue,arrow=Arrow3);
yaxis3(Label("$y$",1),blue,arrow=Arrow3);
zaxis3(Label("$z$",1),blue,arrow=Arrow3);

import three;
size(7.5cm);

currentprojection=perspective(camera=(3,5,6),up=Y);
currentlight=Headlamp;

surface p=extrude("$\alpha x^2$",2Z);
draw(p,material(blue));
draw(shift(0,10,0)*p,material(blue,red));

import three;
size(7.5cm);

currentprojection=orthographic(camera=(3,5,6),up=Y);
currentlight=Headlamp;

surface p=extrude("$\alpha x^2$",2Z);
draw(p,material(blue));
draw(shift(0,10,0)*p,material(blue,yellow));