Projection Man

[LucentDreams]

We sat down with a few matte painters too look at the latest version of Projection Man and asked this too, and some do but most do it entirely by eye.

Another tool that can help with this is Vreel's Photomatch plugin. It can help get the objects n the right place and size

[Simon Wicker]

1) ignore the problem. as long as everything is in proportion it doesn't matter what the absolute scale is - if you use a program like syntheyes to matchmove a live action scene then the scale is initially set to an arbitrary value. unless you actually want to you don't need to be using a specific scale just a consistent scale.

2) guess. take a look at the scene and start modelling according to something you know the scale of. doors and windows are all within certain values so measure something in the real world and assume that holds true for your 3d scene.

3) be accurate. use your own photos and make sure you measure something in the scene so you can be accurate as you are modelling.

cheers, simon w.

[IlaySHP]

if create 3dgrid with equal quad-segments...some like in photomatch in ...sketchup/http://groups.google.com/group/SketchUp/web/V6_PhotoMatch_1.mov (http://groups.google.com/group/SketchUp/web/V6_PhotoMatch_1.mov)http://groups.google.com/group/SketchUp/web/V6_PhotoMatch_2.mov (http://groups.google.com/group/SketchUp/web/V6_PhotoMatch_2.mov)http://groups.google.com/group/SketchUp/web/V6_PhotoMatch_3.mov :) -

[Wizdoc]

First rough model the parts of the image you know are the same size. For example, if you have a castle with four towers. Pick an arbitrary size for the first tower. Small/big enough so you are comfortable working with it in relation with the entire scene - a good rule of thumb is that you can fit the bulk of the area you're modeling into your grid. Then clone the tower object and move it around so that it'll fit nicely with into the other tower. And there's your scale.

The rest is just about winging it. Things are easy to check by just moving the animation camera. If things seem to be placed unrealistically, such as you're moving really fast into the "back wall" of your sky, then adjust the distance and scale of the object accordingly. As you move the camera around, it's pretty easy to spot where the scale and placement of things are wrong.

Of course, you do need to be careful when you calibrate your projection camera first.

[CGTalk Moderation]

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.