HELP on shadow perspective on a floating shape

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  1. #1
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    HELP on shadow perspective on a floating shape

    Hello,

    I stuck on getting the shadow perspective on the floating Shape A correct using the same light source as Shape B. I'm not sure how to go about it. Mock ups are welcome. Thanks

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    Last edited by Pigeonkill; March 21st, 2009 at 11:35 AM.
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  3. #2
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    Bump, still need help please.

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  4. #3
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    I haven't done much of this, but I think what you have to do here is drop down your vertical lines to make a flat shape on the surface directly under the floating shape. Then use that to draw your guidelines from the shadow vanishing points, and from there you can drop lines from the light source through the shape itself to figure out where the actual shadow lies along those lines.

    Edit: Okay, I think this is how it goes. Hopefully I got it right, I'll trust someone will come along and correct me if I didn't.

    Name:  3-d shadow.jpg
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    Last edited by Nezumi Works; March 21st, 2009 at 02:13 PM.
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  6. #4
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    re

    Nezumi Works, Thanks for giving it a shot. I been asking around and been getting a lot of different answers. I'll try that drop box method in red and see what happens.

    Another artist 5th had this idea of using a grid. I added the green shading but the very top part of the shadow extending out I just eyeballed...which isn't accurate at all. Plus the methods seems like a lot of effect for one shadow..."hopefully" there is another method which is more accurate straight forward.

    Anybody who can offer tips, feel free to share. I'm still learning hungry to find an answer. Thanks

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    Nezumi Works, I gave you sample a try and I had no idea the shadow would extend so far. The screenshot is of a 60x60" canvas in photoshop and I still can't fit in the line were they finally converge to connect a shadow...which I think would happen eventually if I made a 120x120" canvas but my computer is too slow for that.

    It was fun to experiment.

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  8. #6
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    Well, you've got a pretty high object in relation to the light source, so it makes sense the shadow would be miles off. The grid method isn't a whole lot different from what I was talking about, it's a simple floor grid based on your vanishing point(s), which helps you keep your surface consistent. It's a good idea anyhow to have one drawn up to keep your items on track.

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    shadow perspective

    I am compelled to point out that before dropping lines to the ground, the height and size of your object is completely ambiguous. For example, I have use Nezumi's strategy, but made the one corner touching the ground. In this case, the shadow doesn't stretch on for miles, as the object is now low.

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  11. #8
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    essex, Thank you

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