AccuRender nXt

advanced rendering for AutoCAD

What is the best way to put a decal on an hour-glass shape?

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You only have two choices of projections-- try both and see.  Neither will be perfect, but one may be a little closer to what you're going for.
I believe it is time spherical decal mapping be introduce, unless there is a way to do it in AR3/4 and have nxt see it and render it thus.

The only way I've found is to convert the decal into a material to the proper scale and use material mapping to place the decal.

I did a set of billiard balls in this way, was cumbersome to set up but renders fast and looks good.

Yes-I created a material and applied it. Cumbersome but it eventually worked.

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