get the world of minecraft client(there should be a link somewhere in the forums too lazy to find it right now) login through the client go to the opticraft server and then go to your creations press escape and select screenshot

decided to post what i had screens of my creations here
my latest creation a model of the furnace in beta(don't have beta yet so i had to look up images for it)

dimesions: 12 tall 10 wide 10 long
model of an snes

dimensions 8 tall 19 long 18 wide
model of a tower from code lyoko

dimensions: 19 wide 19 long 35 tall
pixel art of "its good to be king" by tom

dimensions 90 wide(or would it be long?) 60 tall
original image: http://twokinds.deviantart.com/gallery/?offset=0#/d32vob8
i think this was my largest project yet, certainly was a time consuming one
i'll probably edit this topic as i make more
note: i haven't checked if these were done on another server(opticraft is the only minecraft server i go on currently) and other then the tower(scrapped it for space will rebuild as soon as i find an area for it) all of my creations currently reside in recruit8