Don't take it personal, Never intended to insult the thread or anyone :)
saying it's simple doesn't mean everyone know it neither does it mean it's obvious (And I never said it was obvious) so I have no idea where you got that from ^^ now here's some of the exact thing Zelaxion wrote (And also read Revelix's reply .. it IS simple just like cooking is simple but not many people know it)
Lets not fight .. but if you really want to learn photoshop I think one of the most important things you need to learn is layers and this is a simple layer trick :)
since we're in this topic .. as I said earlier
You can also do that with image of character instead of sentence/word
This is what I meant (I used the same picture Zelaxion posted in his thread post + OS's Logo
and this is an image of ocean that I took randomly from google
Original OS logo that I used is in the spoiler below