There is a way to make these in Blender but did not try it yet if you know how make a guide about it or link it

1. find block texture that you want for the example we will use this green wool block texture

2. get create-cube-from-layer.scm script and move it to scripts folder in Gimp

3. open the texture with gimp then press layer - creat isometric cube

4. export it and your done!

i use the greenscreen mod and make a house out of whitescreen blocks.

then i just spawn the mobs with the egg, disable the damage and make screnshoots with prntscrn

then i open gimp and paste the picture. To make the picture transparent i just press shift-o toggether for color picker click on the white background

then layer-transparency-color to alpha-choose the right color-press ok and the picture is transparent

if you know how make to make mob pictures easier then post a guide about it or link it

Oerkki

Oerkki (Damaged)

Oerkki (Simple Mobs mod)

gallery examples

User:Ph8jPf9M