How to Create Reflection Floor in The Sims 3?

Hi~ I enjoy playing The Sims 3 , i also like to watch Youtube about The Sims 3 how to design my house. But im very curious that how do the people in youtube can build Reflection Floor?? I hoping to have Refection floor too =D , can anyone tell me??

I might be wrong, but this is what you are looking for - just take a random floor, go in the customization section, pick "Metal" from the drop down list and near the golden ones (on the left side in my case) there`s a black square with a shiny thing. When you apply it, it kinda looks like a mirror.

http://www.modthesims.info/download.php?t=431661

i think this is what you are looking for, you need to be a member before you download it