Non-vector (handmade) illustrations
These pictures are not vector, even are not computer (it is common drawing), but I give here several examples for the completeness

Pictures on the papper:
       
Young gibbon - colour Indian ink (2000); 210x297   Cougar - black Indian ink (2000); 210x297   Elk - black Indian ink (2000); 111x100   Camel - black Indian ink (2000); 90x116   Maya - Colour Indian ink (2000); 210x297
                 
       
Self-portrait - pencil (1993); 120x160   Indian with cobra - pencil, coloured pencils (2003); 210x297   Anse Source d'Argent - pencil (2006), 297x210   Taj Mahal - Agama (paint for plastic models), coloured pencils (2006), 297x210   Mammoths - black Indian ink (2007); 120x170
                 
         
Gepard - colour Indian ink (2010); 210x297   Fulbe girl - pencil, coloured pencils (2012); 210x297   Portrait of girl - pencil (2013); 210x297   Portrait of girl with plait - ruddle (2013); 210x297    
                 

Pictures on the wall an so on:
       
Bulguksa (Korea) - Primalex - architectural paint (1996); cca 850x650   Circle Bay (USA, Hawaii) - Primalex - architectural paint (2000); 1050x700   Anse Source D'Argent (Seychely) - Primalex - architectural paint (1996); 1470x820   Kappadokie (Tuerecko) - Primalex - architectural paint (2000); 800x600   Iron Maiden obal desky Fear of The Dark - Primalex - architectural paint (cca 1997); cca 3500x2500
                 
       
Panna - Primalex - architectural paint (2000); 1000x1360   Umtamvuna River (JAR) - Primalex - architectural paint (1996); 800x600   Mapa světa - Primalex - architectural paint (2000); 2500x1850   Žirafy - ZOO Chleby - synthetic colour (2005); 3300x2100   Zebry - ZOO Chleby - synthetic colour (2005); 3300x2100