Hi Michael, Hi all,

thanks for your comments and hints.

My primary goal is to create a 3D tube frame with MOI and to make it look neat. Before getting aware of MOI I used POVRAY and created the model from scratch using POVRAY's built in primitives and an ASCII editor (no comments please :-). Needless to say that after writing hundreds of lines of "code" I was ready for something more convenient. Well, using the first sweep command with a reasonably complex curve in MOI ... and I kinda fell in love. MOI perfectly fits my needs.

After checking your suggestions and doing some additional research I decided to stay with POVRAY (which I still like) and use POSERAY (http://mysite.verizon.net/sfg0000/) to translate between MOI and POVRAY. Fast and easy. I'm happy.

Chris