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Road Building


Knowl Paine
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I was told that for proper vehicle physics, the prims for the road-way need to be halved.

My question is about the method used to cut a prim in half:

I can cut a path through the prim, leaving me with two prim surfaces to texture.

The second method is to cut a slice in the prim.

I'm just not sure if a prim halved by slicing, uses the same physics as a prim that has a path cut through it.

 

I need to have a prim with one texture surface for the 4-way road intersection. 

Can I use both methods? cutting and slicing?

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You're looking at building a road with a megaprim.  The problem is that when you cut any prim, you haven't really removed the missing part.  Its bounding box remains the same.  If you cut the upper half of a prim away --- whether by cutting or slicing --- and then try to walk on it, you'll find that you are apparently walking on air.  What you're actually walking on is the bounding box, which is still where it always was.  The rule, then, is that if you cut a prim for something like a road or a floor, always put the cut face down. 

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