|My own creation (MOC) started as a 3D model on the computer. I ran some custom code that splits the 3D design into blocks. It took a bit of fiddling but I eventually got the code to make the blocks the correct ratios and size so if built from real LEGO bricks the design would look correct and to scale.
My first conversions were too ambitious. A 1.25m hulk would be 40,000+ bricks and way beyond my budget. I eventually decided on around 3 quarters of a metre. I then halved that again to make a prototype for baby hulk. About a month of computer design and it was looking good. I took the 3D blocked template and used this as a guide to build it in LEGO digital designer.
Another couple of weeks to refine in LDD design and I started putting it together with real bricks. In LDD I could display a single slice or layer and add it to the build. Layer after layer until it was finished. The prototype illustrated that the process and method worked and also what brick types worked best for sculptures (1x3 and 1x4).
I needed a lot more bricks. In total it took over 6 months just to collect all the green bricks. The large hulk was about 3 months just to design on the computer and build in LDD. I used 1x1 brick in LDD to shape the design. It meant I could easily shaved bricks off and add new ones. To sculpt and make the design better. The head, just like baby hulk, used plate instead of brick to enable a bit more detail.