when you're setting the "radius" of a torus, is there some sort of formula to get the ring to be the width you want? I've tried dividing the desired ring width by the total diameter of the torus and multiplying by 1000 and I can get an approximation, but it isn't really accurate and I have to fiddle with it to get it exact. I've also noticed that the difference between my approximation and the actual number increases with the size of the torus, so I'm wondering if perhaps it's supposed to work that way but it is set to do it at a really small width, rounds, and then multiplies so the rounding becomes more obvious when you enlarge it? If so, would Corel please create a patch for that? It's annoying.

Divide the setting in the torus editor by 100, this will give you the radius of the torus thickness in bryce units. To make a cylinder match up to the end of a torus that has been cut in half (by boolean) so that you form an arch the cylinder will have twice the raduis set in the torus (default torus 256=2.56, cylinder needs to be 5.12). Now all the calcs are based on a torus att unity size (20.48,20.48, 5.12). You are limited to 1024(10.24) bryce units in the torus editor no matter how big you make the torus. So match things up in unity size before resizing anything get it to work right.

thank you! too bad it works best in unity size, though...I almost never work in unity size, it doesn't have very nice numbers. Well, for me, that is; the computer probably likes them.

Well, I frequently work in unity size just to get things to go together, and then resize whatever I'm working on the the scale I'm using. If I'm doing something close, such as an indoor scene, I'll use 1.00 Bryce Unit = 1 inch. For larger, outdoor scenes, I normally use 1 Bryce Unit = 1 foot, or 1 BU = 1 metre. If I import something, such as a poser figure, I can use the windoze calculator to figure out what percentage to resize it by, so it's the height I want. I learned early that keeping things in relative scale from the start makes life a lot easier when the scene starts to get complex.