(Photo: YouTube)

Computer-generated special effects make us suspicious of anything we see on the screen.

So when we first saw this incredible Dr. Seuss-looking contraption in the middle of a forest play Bach's “Jesu, Joy of Man's Desiring” (in a commercial for a Japanese smartphone), we immediately had two thoughts:

“Is that real?”

And, “How did they do that?”

Bach's "Jesu, Joy of Man's Desiring" featured in an incredible Japanese smartphone commercial.

The answer to the first question is a resounding yes. I recently came across this two-minute video that gives a glimpse of how they did it.

The making of the Bach-inspired "Touch Wood" smartphone commercial.

Can you imagine how much time it took?