I have made some modifications on my raspberry pi.
First of all I added radiators on processor, Ethernet-controller and voltage regulator.
The second one, I cut the custom case for raspberry.
At home I had only 9mm compressed paper. So I took an office knife and a ruler and started to measuring and cutting. This case consists of three layers (like a pie):
which holds raspberry pi
and one part which is used to attach raspberry to the VESA on my TV
Then I painted case in black color. The result of my work you can see on the screenshots: