I made one pumpkin then using that mesh I carved faces and created jack-o-lanterns. They share the same diffuse, specular, and normal map.
The high poly pumpkin was made in Zbrush. I played with the new Z-remesher for my low poly but I found it best just to retypoligize by hand in zbrush.
Since I was going for UDK the 3ds max normal map was a good fit. I churned the map through NDO2 for a spec map and AO. The reason for all the psychedelic insides at the bottom is for future jack-o-lantern puke. I couldn't quite get it looking right so that part is a "coming soon" feature of my map. :B
With the pumpkin modeled and the textures made I now have the opportunity to go back and make as many different jack-o-lanterns as my heart desires.
The next gen consoles are coming out soon and I am so excited to see what this means for environmental art.