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Stabbing weapon fx

Posted: Fri, 24th Oct 2003, 9:12pm

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Wild Thing

Force: 190 | Joined: 29th Jan 2002 | Posts: 29

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Can someone on here make a horror style stabbing weapon from the front camera view? eg. arrow, knife, and/or machete coming out of a chest or throat wound from a front camera angle. There is a scene in the horror film Wrong Turn that uses an arrow in this way. The guy in the scene is standing with a real blood stain on his shirt and then the CGI arrow suddenly sticks through the spot where the blood stain was. It was a very short shot just used to establish that the arrow came through his chest, then when they cut to the next angle it was fake arrow that was actually applied the actors body. But I think it would be very helpful, if these various weapons stabbing through would be made. What does everyone else think?
Posted: Fri, 24th Oct 2003, 9:57pm

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BackOfTheHearse

Force: 2660 | Joined: 17th Nov 2001 | Posts: 1099

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We already have several arrow plugins that the back end could be masked out on to create the effect you're looking for.
Posted: Sun, 26th Oct 2003, 3:01am

Post 3 of 12

Wild Thing

Force: 190 | Joined: 29th Jan 2002 | Posts: 29

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I disagree, I don't think any of those arrows would work for that type of effect. They might work fine for a side shot, but there is currently not a good arrow that could be used for front view arrow impaling. And besides I also mentioned similar fx (which they could all be used under one effect under the blood and gore fx) using machete and knife stabs as well as the arrow
Posted: Sun, 26th Oct 2003, 2:36pm

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Crawford

Force: 260 | Joined: 5th Oct 2003 | Posts: 162

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Why not use a practical effect? Get an arrow someone doesn't need -- maybe one that broke -- saw it in two, and glue it to a small block. Put the block under the target's clothes, with the arrow shaft sticking out through a hole in their clothes.

Ouila! Actor with an arrow stuck in them, and the lighting and shadowing works PERFECTLY.
Posted: Sun, 26th Oct 2003, 7:48pm

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Wild Thing

Force: 190 | Joined: 29th Jan 2002 | Posts: 29

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Ok, that would be fine for after the arrow has already been shot through. But, what I'm requesting is an effect of the arrow actually coming out of the person. eg. the person in the real shot has nothing on his/her chest or throat, the effect could then be added showing the arrow or blade actually piercing the flesh and coming through the wound.
Posted: Sun, 2nd Nov 2003, 8:13pm

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zeocom8

Force: 200 | Joined: 5th Sep 2003 | Posts: 9

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Yea this would be use full. But it would have to be a fast shot, because the REAL arrow that you would show and the fake one wouldnt look the same. So you would have to splice footage really fast
Posted: Sun, 2nd Nov 2003, 8:13pm

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Exclamation

Force: 2067 | Joined: 28th Mar 2003 | Posts: 480

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It WILL look fake. Use practical (as stated above).
Posted: Sun, 2nd Nov 2003, 9:10pm

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Wild Thing

Force: 190 | Joined: 29th Jan 2002 | Posts: 29

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I wouldn't look fake, it didn't look look fake in the film Wrong Turn. All the effect would be is a quick effect of the arrow/knife/machete piercing blood stained flesh. Just take a look at the scene in the film and you'll see what I mean. This would be very useful.
Posted: Sun, 2nd Nov 2003, 9:28pm

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Crawford

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You should also realize that you're not going to be able to see the arrow before it strikes. With an NTSC framerate of 30 fps (basically), anything that crosses the screen in less than 1/30th of a second will be nothing but a blur, and might not even be visible.

Watch older films -- they often didn't even try to show a bullet. They'd have a shot of someone shooting a gun, then cut to someone clutching their chest and falling down. Same for arrows, spears, rocks, etc.
Posted: Sun, 2nd Nov 2003, 9:51pm

Post 10 of 12

BackOfTheHearse

Force: 2660 | Joined: 17th Nov 2001 | Posts: 1099

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You're going to think I am crazy, but hear me out...

Take a mousetrap or some other fast swinging spring mechanism that is really small. I said a mousetrap because it has a nice wooden panel on it you can use as a base to it.

Take your arrow and cut the pointed end off so it is about 5 or six inches long. Alter the metal bar that is meant to kill the mouse so that it securely attaches to the arrow tip. But make sure it is secured a the base of the arrow, so that the original shape of the mouse-killer bar is lost. Otherwise, when you fold it down, the bar will stick up and reveal the gimmick.

Now, attach it to your actor however you want (I taped the wooden part to him using duct tape.) Oh, and as a side note, I would color the mechanism using tape, paint, whatever, in order to make it match the color of the shirt the person is wearing. Now, what you should have is an slightly unhappy actor with a mousetrap stuck to his skin, with an arrow tip sticking straight out from it. Fold down the arrow (in other words, "set" the mousetrap) and secure it. I altered the pin that normally was for the trap and attached it to fishing line so that a slight yank would release it. But you can do whatever works for you. Have the actor put on a shirt, and cut a slice in the cloth vertically to match where the arrow tip resides when set. That way it can flow freely through the shirt when released. You may want to add a small stripe of the same color paint/tape you used on the rest of the trap to the very top of the arrow tip to mask it out a little better when it is at rest (note: By "top of the arrow" i mean the part that is facing the sky when it sticks straight out or "released". That way, when folded down, it is hidden amongst the color of the shirt, etc.).

Roll camera. Release the mechanism. The arrow snaps into positon. Ba bing, magic arrow appears in chest. The framerate of the camera won't really catch the upward movement of the arrow tip, just that there was movement in general and that there is now an arrow where there wasn't one before. If the masking is a little off, Photoshop can fix it in about 3 seconds.

This will look and work a lot better than a CGI arrow. No need to worry about lining it up to look convincing. It is just THERE. It goes where it is supposed to.
Posted: Sun, 2nd Nov 2003, 10:59pm

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4036Douglas

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you really should do it on set, but here;s one i did in alam real quick.

EDIT: yes thats me, im not really that short, i was kneeling because i couldnt get the camera high enough, and the doors go to a bathroom, and closets. just clearing things up for you there smile
Posted: Mon, 3rd Nov 2003, 8:55pm

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jessy

Force: 650 | Joined: 8th Jun 2003 | Posts: 384

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how about you take a picture of the arrow, put it into photoshop, cut the arrow and past into into a blue screen. Then bluescreen it in your editing system, move the arrow frame by frame dont forget to add motion blur.