Wallpaper in Process 3

I continue my wallpaper with trying to use the "Masking technique". It took me quite some time to understand it and I'm still fuzzy about it but still i prefer the "Eraser Tool". Masking is the same as using the "Eraser Tool". Make sure you are at the right layer before your proceed.

I want to erase the background of the left lion so, I make sure it's the "Lion 1" layer.

Go to the "Eraser Tool" on the Tool panel. Click on it.

Then, I erase the part I don't want which is the background.

Zoom in to the parts you cannot see and do the same thing.

Finally, we got the lion.