Camera in box.

Thank You, Roman!
Youre last example makes excellent picture! But works only for one wall.
I adjusted focus settings for earlier variant, it seems quite well.

Inserting sound channel in . json stay the problem for me. I use speaker object, but exported . json is without sound.
My system: Acer AspireV 13, LinuxMint 17
Here is my attempt with voice.

Hello.

Take a look at this.

Sorry wrong blog :)