From: PurringFox McMillan
Would someone please explain the difference in Prims between Sculpty and resgular (old skool?) builds. Perhaps take a few examples. A basic bed with the usual stuff, a spiral staircase and a 6-room 2-story house.
You're not really asking questions that can be answered. The difference between a sculpty build and a regular build is simply that one uses sculpted prims and one doesn't. Obviously you have to know that already though, so what is it you're really trying to ask?
From: PurringFox McMillan
On the latter would you build each story then attach the two after?
You could, or you could build it all at once, or you could do it through any other method you could think of. It's entirely up to you.
From: PurringFox McMillan
What exactly defines a prim in each case?
I can tell you what defines a prim, but I'm not sure what you mean by the "in each case" part. A prim is a prim is a prim. Whether it happens to have been used as a part of a bed or a staircase or a house or anything else does not change what it is.
The word "prim" is short for "primitive". In geometry and 3D modeling, a primitive is a basic shape, such as a cube, a cylinder, a sphere, etc. In SL, geometric primitives are used as building blocks for nearly all things.
For an easy example, think of something like a snowman. To build one in real life, you'd stack three large snowballs to form the head and body, and then you'd attach a couple sticks for arms, some dark stones for eyes, and a carrot for a nose. In SL, it's exactly the same (except you're not using snow, of course). To build the head and body, you'd stack three spheres and color them white. For the arms, you'd attach a few cylinders, colored to look like wood. For the eyes, you'd use a couple more spheres, colored black. For the carrot nose, you'd use an orange cylinder, tapered to a point at one end. All of these things are primitives. The same objects in a different configuration could make a piece of furniture or a flower or a hat or whatever else you can think of. They're all still primitives though, no matter what you make out of them.
So called "sculpted prims" can be described most simply as prims that have been reshaped through the use of a third party modeling program like Maya or 3DS Max. For example, you could take that orange nose, and sculpt a few bends and bumbs into it to make it more realistically resemble a carrot. Instead of perfect spheres for the snowballs, you could make them lopsided. Etc., etc., etc. (Of course, the practical uses of sculpties go way, way, way beyond just these simplistic examples, but what I've said here is the easiest way to answer your question, I think.)
One advantage of sculpting in this manner is that it allows you to save prims in most cases. To bend that carrot using ordinary prims, you'd need to line up several small ones to form the bent shape, but with a sculpted prim you can do it with just one. Make sense?