Thanks guys. Before start drawing, I made a quick blocked version of robot and vehicle, to understand how a transformation could occur here. I think this is a good solution: Robot and vehicle, side by side. A good compression! https://www.amauriilustra.com.br/CGTalk/trans_01.jpg A closer view of vehicle. My set/oct challenge model, Michelle Heart, appears here as my test pillot. I would like to see how the vehicle will be with a human aboard. https://www.amauriilustra.com.br/CGTalk/trans_02.jpg And this is what I expect about the robot: He should be 2.5m tall, skinny and fast, ready to run and fight. The big wheel (70cm radius) is used by him as a weapon, that he throws against his enemies.The wheel has some kind of sensor, that always lead it back to the robot hands, like a boomerang. https://www.amauriilustra.com.br/CGTalk/trans_03.jpg Based on this, I think I could make some sketches now.