Image of sim is see-through

Could you post a picture ? To do so, change to window mode and press Print Screen to take a pic. Paste that into Paint and save it.

Then upload the picture to a third party image sharing site like imageshack and then post the link here.

Also what kind of graphics card do you have ? Are your graphics drivers updated and are you custom content or mods ?

https://imageshack.us/i/ipXGEbDJp

@beatrizluvkpop Looks like an issue with your graphics card.

Could you post your Computer's DxDiag?

To gather a DxDiag on your computer, please follow the steps here: http://answers.ea.com/t5/The-Sims-3/HOW-TO-DxDiag-for-Sims-3-PC-Only/td-p/1049584/

Please either use pastebin.com and put the link here or use spoiler tags.