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crawling out of a 3D crater
My plans are to shoot some video of a field where a 3D ship has crashed, creating a crater. The crater will be 3D also. The shot will be tracked with Boujou, the 3D will be done with C4D, and the comp will be brought together in AE.
The problem ive run into, (seeing as how ive never done it before), is that I need one of the actors to crawl out of this 3D crater, but im stumped as to how to do this. I currently do not have any green screen, so that it out of the question right now.
Is there a way to do this, so that the actor will appear to crawl out of the crater?
Thanks
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6 Replies
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Thanks Dave for the info. In the past, I have done tons of roto before. Usually when I didnt have a chroma key, or a premade alpha matte.
I have already created a test shot (animation) of a small crater type hole in the ground, and it worked nicely. The whole idea has not been put on paper yet, (as you suggested), but it has been discussed between myself, and my cousin who is helping and will probably be the one crawling out of the crater.
If i have to roto, then thats not a big deal. Ive done worse. The main problem is that im not sure how to shoot the footage… such as, should the actor crawl out of a real hole, or should he climb of up a wall, and then the roto’d key will be placed with the crater.
I know this will be a rather large undertaking, but im always up for a challenge, and to learn something new.
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Sorry about that. I should have given more details.
The crash shot will be back from a distance.. wide shot. The next few shots (character crawling out) will contain both wide and tight.
The wide will be from several distant angles (human eye perspective), and the close up tight shots that will be taken into account will range from near ground level, or human eye level right on top of the character as he stands up after making his way out of the crater.
The spaceship (or at least the remaining debris) will be visible inside the crater. There will be some fire, and smoke rising.
If I can recall, I think I have some cheap green screen type material that ive used before. I had forgotten about it.
I can see that someone answering this question is rather difficult because all the details are not right in front of you, and without having an understanding of the shot, its hard to say.
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That sounds great, but we dont have a real crater to use. Im assuming we’ll have to find a hole, or make our own.
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You might want to check Andrew Kramer’s tutorial series on creating a 3d crater. It’s done in AFX and 3dsmax but the principles are the same in any 3d app. https://www.videocopilot.net/tutorials/3d_crater_p1/
Judging by the description of your project you might be surprised of how these tuts approach pretty much what you’re aiming at. -
Thats funny you mention it, because I had got the idea from that tutorial, but wanted to do more with it. Andrew’s tutorial was based on a character walking around the debris, but I wanted to do more, plus it would go along with the video ill be shooting.
Ive already made a small test animation that I tracked with a small version of a crater in some footage, and it turned out quite nice.
As far as the original question concerning how I should shoot it… I think what im going to do is set up a table (or something sturdy) covered with green screen and film the actor climbing up onto the table. Then use that for the crater shot.
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Well, I was speaking about the shot where the camera would be placed at the edge of the crater looking slightly downward, then have the character climb up, and onto the table while having green screen on the table, and behind the character as well.
For a wide shot showing the character making his way up the slope, on the location, there will be a embankment that we can line with green screen and use because its part of a sloped dam for a large pond. That should give us the “slope” we need.
The shots themselves arent going to be anything too entirely difficult. The camera will be locked down on a tripod.
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