Effects
You need the Sims 3 Ambitions expansion pack for this to work.
There are lots of effects all listed on the website below with pictures. There are instructions how to use the fog emitter and type in the codes below:
FIRST:
1. Go to the cheat box (shift+ctl+c) and type in: [testingcheatsenabled true] and press enter
2. Go to the cheat box again and type in: [buydebug] and press enter.
3. Go onto buy mode. Click the button where it shows collections of things. eg. comfort, electronics, decor ect.
4. Click the box that looks like a question mark. This will either be at the top of the tooolbar or in the tool bar with comfort, electronics ect.
5. Click misc. (the tab that looks like a pyramid of three dots) click the custom content on the side that looks like a weird flower and click the Sims 3 ambitions icon.
6. Select the fog emitter at put it anywhere on your lot.
7. shift+ctrl+click and click on change visual display. Then type in one of the follow codes:
http://forum.thesims3.com/jforum/posts/list/467541.page
the website above shows all pictures and codes of all the effects
HOPE THIS HELPS!