Sculpted mega prims

Anybody got any linkage to info on how to do sculpted mega prims?

I've used a giant sphere for a sculpty. Worked fine.

You do them the same way you do normal prims in terms of implementation.
However you cannot stretch a huge prim, I stopped making them as I was informed
that huge prims in general take up more sim resources and that Huge Sculpted Prims are
especially a hog on sim resources.

The biggest drawback with huge prims is the collision mesh is always treated as a cube. To be fair, this is apparently, from my limited testing, the same for sculpties in general. But that cuboid collision mesh means that for ANY huge prim, the disparity between the collision and the prim you see will get very obvious very fast.

And don't even think of enabling physics on them.

I don't know about whether they take up extra resources or any of that other stuff, but you can rez any mega prim and change the type to Sculpted on the Edit/Object menu. I think that's the right name of the edit page, I'm not in-world now. Whether it has an impact on sim performance will probably depend a lot on how big it is and what you are doing with it. If you see a change in performance after you make it, you should get rid of it.

I've never seen any evidence or Linden statements to support either of these assertions.

*nods* I found that problem with all of the mega prims beyond the 20X20X.5.

If I remember the FAQ or blog correctly, I think the collision mesh on a sculpt is a half-sphere.. So this begs the question of does the collision mesh change when turned to a sculptie?

When physics are on they cause major issues. Other then that they are generally ok.

I had giant balloons, made from the 32x32x40 megaprim, to 'support' my skybox for a few months. I expect any megaprim can turn into a sculptie, but bear in mind most of them are cuts/dimples of a few basic prims, and turning it into a sculptie will get you the size of the full starting prim. The reason I say 'I expect' is because I never tried rezzing any of the truly huge ones (although a 100x1x1 candlestick looked quite impressive, if a bit out of proportion).

Mine were kept phantom, & high up where they didn't block anyone's view. I didn't get any complaints. YMMV.

As for how you do it - rez megaprim, change the type to sculpted, select scultp texture and you're away

Even with regular sized sculpties that's when it's a artistic sculpture or something I just set it to phantom.