HET-610: My Pictures and Figures
by Luis Argüelles

Rotations in 3D space
  
Before applying any rotation:


 

After applying ROTX-30, then ROTY-25 and finally ROTZ-70:
 

 

After applying ROTY-25, then ROTZ-70 and finally ROTX-30
 

 

Finally, the complete set of rotations in the same image:
 
:
 
As can be seen, rotations in 3D space are not conmutative operations.