Artur Żarek

One particular feature of the Curve SOP that I CONSTANTLY find myself to require is an ability of the curve to adhere to some projection surface. In other words, I'd like to be able to pipe a projection surface to Curve SOP's, currently nonexistent, second input in order to have its points to be immediately projected on the surface, along with the curve itself.

I am fully aware that I can project the curve on the surface with the Ray SOP downstream, or draw a curve with Draw Curve SOP and then resample it, but it's not the same as creating points of the curve and have the curve to be immediately projected on-the-fly.

Here's a demo of the behavior that I'm looking for, from a video that I created some time ago for other software. Ignore the polygons created from the curves as they're irrelevant to this subject. Note how the curve between the points nicely follows the projection surface in real-time.

0:15 to 0:24
https://youtu.be/wyqukJQPFU8?t=14 [youtu.be]

Of course, the projection should also apply not only for the Curve SOP in Draw Mode, but also in Select/Edit Mode.

Has someone perhaps already came up with an HDA that addresses this (maybe via modification of the Draw Curve SOP)? Are there any existing tools that implement it? Is this planned for the future?

I think there's something very wrong with the Sculpt SOP. What I've noticed to be happening, is that occasionally the operator expresses a tendency to destroy the mesh that it operates on.

Usually it goes like this:
I sculpt a remeshed geometry using several Sculpt SOPs piped in a sequence. Then, I move to other parts of the network and do some sculpting or other operations there. These parts of the network are on a separate branch so they don't affect the Sculpt SOPs. After working on these branches for some time, if I return to the previously sculpted parts, the mesh that I once sculpted becomes garbled (see: attached image).

This issue forced me to manually stash the sculpt result immediately after finishing sculpting using Stash SOP. For backup purposes.

I've already lost several hours of work because of this issue.
Has anyone experienced this problem?

Absolutely! Thank you, Atitimar.