My first work in Photoshop using layer mask. I had some difficulty using masks initially; and later , I got used to it. I had 3 separate masks, 1. for the whole organism, 2. for the ventral part of the crawler; and 3. for the ground part underneath the crawler.
Crawler and flame photos from sxc.hu.
image 1024x768
screenshot
red slug from sxc.hu (uploaded by coendeurlo)
torch from sxc.hu (uploaded by rolve)