Hello,

I've used MoI countless times for this style of drawing taking manual steps and complimentary applications to get there. I use the iso at points script in MoI to generate a line set, export the image with background, convert the raster background to a very limited color vector, boolean the iso lines with the vector background and use some brushes to apply the dot dashed style to the remaining lines.

The limitation in many cases comes is with the lack of lighting control in MoI. It's not really meant to have this feature so I find that positioning lighting on the model in another application, rendering it out and then compositing it into the background image of the MoI export works, even if it's sort of a long way around to get the line work flowing a bit better.

What I'm left with eventually is a pure vector line work technical illustration whose layers can be individually tweaked to change the drawing aesthetically, e.g. modifying line thickness, dot dash and line spacing. Most of the time spent with MoI export in my case is cleanup, little line fragment deletion, trimming intersections and overshoots in the 2D curves and extending curves along their tangents to their intersections. Currently it's just more efficient to perform those operations in other applications, but if those make it into MoI, it means one can stay in MoI and export a nearly complete illustration set with minor adjustments.

If MoI had features like an integrated distribution tool that works with the align tool and the ability to move and explode part assemblies, cutting planes, lighting control, surface and curve extension along tangents and little things like curved leaderlines and automated thick/thin line assignment it starts allowing for output of very high quality technical illustrations that don't need to be tweaked in multiple applications, an even bigger time saver. Suddenly highly polished technical illustration output doesn't take loads of time and money, MoI takes a larger role beyond design.

Having an interactive hatch tool would be next level stuff, similar in operation to the current iso tool to rapidly place down and move shading lines along the model surface but have the line termination depend on the brightness value. That sort of tool also might open up possibilities for more defined thick thin line assignment. Of course that comes back to lighting intensity and position control within MoI but your illustration output that took minutes would only look like it took days.