Mmm… I think you could make a whole thread, in and of itself, of why Lovecraft has yet to be very well translated to the screen. And you could argue that “Re-Animator” did just that, considering that the original story was as funny and disgusting as it was terrifying.
Then again, you could argue that Dr. Herbert West was actually the monster in that story, in much the same way that Peter Cushing (not Christopher Lee) was the monster in all those old Hammer Frankenstein movies the Brits made. As a child, and as an adult, I found Cushing’s soulless, ruthless scientist FAR more terrifying than any of the guys stumbling around with a faceful of latex and putty.
I too would like to see a big budget “Mountains Of Madness,” but I suspect every time someone pitches it, some Hollywood dip producer says, "Didn’t Kurt Russell already do that one with “The Thing?” "
As to whether it’s scarier shown or unshown… I think it very much depends on how it’s done.
“Jaws,” for example. We hardly ever glimpse the shark until the end. Hell, the first victim is utterly terrifying, and we NEVER see the shark during that scene. And who could forget the scenes with the barrels?
We see very little of the shark because Spielberg didn’t LIKE the shark. He thought it looked fake, just like they thought the Alien looked fake, in the first movie… and, consequently, they worked around it.
Thing is, we know what a shark looks like, and we have a clue as to how a shark should behave. One of the scary things about the Alien was that we had NO clue what this thing was like, or what it could do. Hell, it grew from cat size to Shaq size in fifteen minutes.
The film “Anaconda” winds up being laughable, I think, NOT because we can see the snake… but because any moron knows that snakes simply do not behave in this manner. “Anaconda” was laughable because it was a crappy movie. It might have been improved if we had seen less in the way of snake acrobatics, but I’m unconvinced that would make it a better movie… simply a little scarier.
…but now, two other examples: “The Thing,” and “The Blob.”
The Blob is a creature you HAVE to show, simply because it’s amorphous, it’s indescribable. I personally found the 1988 version to be a very effective little movie, largely because we get to see a LOT of the damn thing, and exactly what it DOES to its victims. Gross? Gory? Sure. But who wouldn’t be scared of being dissolved alive?
Admittedly, one of the scenes I did find quite creepy was when the injured government technician is babbling insanely about how the Blob ate his partner, and he could see his buddy, INSIDE the thing, trying to scream… a scene we never actually see. We just hear the jabbering, terrified technician DESCRIBING it. Theatre of the mind is far from dead…
…as proven by Carpenter’s “The Thing.” We do get occasional glimpses of a horrible shapeshifting nightmare-thing. Hell, we get a GOOD look at it on several occasions, most notably the scene where one chap has a heart attack, and they try to use a defibrillator on him…
…but the horror in most scenes with the Thing is simply a matter of being creeped out by its appearance. Most of the movie is fueled by the rampant paranoia of the cast – the archtypical “one of us is a monster,” plot. And Carpenter and the cast make it work wonderfully. The scenes where the monster actually SHOWS itself are just the cherry on the cake… and I think it works very nicely that way.
…and I think that largely covers it. Show the monster? Yeah, I think so. Computer animation can literally show us anything anyone can imagine and communicate, these days.
…but Stephen King was right. Even Great Cthulhu isn’t very frightening if he’s just standing there when you open that door. “Well, Great Cthulhu is pretty terrifying, but I was afraid that he’d been nominated as George W. Bush’s running mate in 2004!”
It’s all a matter of what you DO with Cthulhu. And the rest of the movie. “Jaws” wasn’t really about a shark, folks… it was about this sheriff guy. “The Thing” was about a buncha guys trapped in the Arctic who allovasudden couldn’t trust each other. “The Blob” (BOTH versions) were NOT about amorphous caustic jelly from space, but about teenagers trying to become adults in a crisis situation.
THE MONSTER is NOT the star of the show. THE MONSTER is simply a PLOT DEVICE. ALL the best movies are about PEOPLE, not monsters… or about people who have BECOME monsters, and how they, as PEOPLE, deal with that.
Filmmakers, take note.