"Nope...  Except perhaps doing a system restore back to before you uninstalled Rhino...   Maybe that will work if you haven't deleted the directories Rhino was in. ----H"

"Unfortunately, I tried something similar, but it didn't work here...  Still trying to figure out why. --H"

"Just a couple of questions to help diagnose the problem: Are you able to access the detailed controls at all?  If so, can you send a screenshot of the dialog? If you can access the detailed controls, do changing any of the settings in there…"

"I might project the rectangular grid you want onto the surface, split all the resulting curves with each other, then generate new individual surface panels using the resulting curves and something like EdgeSrf.  You might need to rebuild the…"

"Are you using the Rhino sun or the V-Ray sun?  I'm not sure the Rhino sun study animation can change the position of the V-Ray sun...  ----H"

"This should in principle be scriptable, but I'm not getting it to work right now.  I will get back to you as soon as I figure something out... ----H"

"1) You should be able to mirror them about the XY plane, that effectively inverses the Z values. From the Front view, select your geometry, type Mirror (Copy=No), type 0 for the origin and with Ortho on, pull the cursor out along the X axis…"

"In 64 bit versions, Rhino can use all the RAM you have in your machine.  And I mean ALL. ----H"

"F7 should toggle the grid on/off.  Also if you go into Document properties, there is a Grid page with settings, see if that doesn't help.  The Grid is a document property, not a global option, so it can be different for every…"

"It is still the same, you may need to raise the height of your command line window to 3 lines (or hit F2) to see it all... CPlane angles and deltas:  xy = 45.000  elevation = 35.264    dx = 100.000  dy = 100.000  dz =…"

"Nice example, thanks! ----H"

"Below is the result of extracting the lofted surface wireframe (density 8) and running SelLine... ----H "

"It should be possible to do what you want in rhino without T-splines.  The problem is that Rhino will create triangles along the edges with a trimmed surface.  With the surface that you show in your image, it is not too hard to re-create…"

"Actually in looking at this again (being less tired) I see that Rhino is actually doing the Loft correctly.  It is connecting the line with the arc with straight lines in equally spaced intervals along both curves, which is what it's…"

"Arcs in Rhino of more than 90° are composed of multiple spans joined by fully multiple knots (kink joints).  If you turn on control points for the half circle, you will see 5 control points, try pulling the middle one upward. Under some…"

"This has to do with the particularity of arc and ellipse segments in Rhino.  They are rational (the control points do not all have a weight of 1), and segments of more than 90° are multi-span - they have fully multiple knots (kinks) at the…"