This object is just 4 Poser primitives with a simple 2D texture applied. It is lit by a single spot light set to white. Why am I getting this funky lined pattern on the side and bottom?

<strong>bandolin</strong><br />
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<p><em>Caution: just a hobbyist</em></p>

Here is the same object w/o the texture.

<strong>bandolin</strong><br />
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This is the texture I'm applying

<strong>bandolin</strong><br />
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These are a pair of examples with the texture above applied. On the left is a box and on the right is a 1-sided square. This is really bizarre. Something is going on here that I'm not understanding.

<strong>bandolin</strong><br />
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increase your shadowmap size and that should go away.

Here I adjusted the shadow min bias to 5 instead of the default .8. The problem seems to have gone away.

<strong>bandolin</strong><br />
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In this example I increased the Spot Light's Map Size to 512 from 256 as Khai suggested.

<strong>bandolin</strong><br />
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<p><em>Caution: just a hobbyist</em></p>

In the case of Poser, which is using mid-point shadow maps, you can also try making your object thicker (as you noticed, the artifacts are stronger on the single plane), that should make things better. Otherwise, you have to deal with shadow bias - it's an unfortunate necessity that comes from the shadow mapping algorithm itself and it present in every program using shadow maps.

Oh, another with those render lines. I got those when rendering in Terragen aswell. Its nasty when you have a great pic... I wish I knew how to get rid of those. LS

Ooohhh, is that what those lines were... I got them too on my hi-res square, but I figured they looked interesting and used the prop as a sort of textured semi-opaque curtain. So, now I understand more about this. Thank you for asking and answering, Everyone.

Eternal Hobbyist