Yes, I think it's a definite possibility.
The image of Parker, slumped over dead, is interesting in that it shows what could be bloody footprints left by the Alien?
If you own the Rinzler making-of ALIEN book, there's a variation of this image - look closely at the doorway - and you can see Ripley's face through the steam.
I came across an image once, a behind-the-scenes b/w still - a series of them (taken from a contact sheet), of the set up for the filming of the dead bodies. It shows Cartwright, wearing white shorts and bare-legged, standing on something, with Ridley Scott in front of her. Yaphet Kotto is in his sitting position, being tended to by a make-up artist?
I've tried to enlarge the image, but it's so tiny - postage stamp-sized - that it was pointless to upload it. You've probably already seen the image, but if you haven't, I could upload it for you?