Author: PressureLine (thanks!)
I have been asked this before and here it is. The custom media.xml file that takes care of the removing the blur effect when you are using the camera from the inside of the mod. It changes the camera focus setting to the interior or outside of the mod go out of focus. See the screenshots for an example.
Install: just place the media.xml into the Media folder (FOLDER, not the zip called media)
I did not make this media.xml and i deserve no credit for it. That goes to whoever first came up with the idea.