All you need to do is use your favorite scribing tool to make a small groove where the seat base and carpet meet, like so:


I have yet to scribe over the transmission tunnel in the above pic.
You can use this same technique to add definition and fool the eyes into thinking parts which are molded as one are actually separate parts, Things like consoles, seats in promo-style interiors, washer reservoirs and batteries in Monogram kit engine compartments, etc. Simply adding a little shadow line, or going even further and slightly undercutting the molded in 'part' will make a difference visually, yet costs nothing, other than a few minutes of your time.














