I will show you a summary of the whole process.

Step 1: I photographed two figures that I assembled with random pieces to use as a reference for the highlights and shadows. I downloaded the original images of Dipper and Mabel to also use as a reference for the appearance and colors of the characters.

Step 2: I built Bill out of Lego pieces and took a picture to use for reference.

Step 3: I completely drew all three characters with photoshop.

Step 4: I drew all the bricks in the scene.

Step 5: I created the special effects and added the lighting effects. Then I played with highlights, contrasts, blurs and that shit until everything was just the way I wanted it.

As it usually happens to me, the initial idea became more and more complex as I progressed, but it's something I'm already used to. *facepalm*

If I discover a serious flaw I will correct it.

That's all.