This is a model I made for a future animation but I would like to share it with you guys first!
This model contains the slime model with a face (No shape keys) a rig to control the slime (Basic Rig) and a translucent material for the slime making it look like a real slime from the game.
If you have any problems be sure to leave a comment and i'll do my best to help you.
Look at the license. You can do it as long as you give credit on almost every model here -_-
can you try to make the transparent like this? http://www.minecraft-spielen.com/wp-content/uploads/Minecraft-Animation1.jpg
In that photo is slime maked by slamacow... and that slime have a cub inside and a cub on outside, and that cub of outside are just a glass+glossy :P And in your photo the slime is maked on Cycle Render, but this slime maked by SebLex is maked on Blender Render
Awesome!