affected modes are technical, pen and artistic view from what i see. here i drew a simple sphere.
Are you using 6.17? Silhouette drawing has been updated in that version
using the latest build which outdated the last release candidate. 6.17.19232.11342
Please post your model. I realize it is very simple, but want to make sure I’m testing with exactly what you are using
i realized this on a different model, drawing a sphere i only did to see if i can repeat the issue myself.
anyway here you go simple sphere.3dm (3.1 MB)
TestToggleTechDisplay for now to draw with the older technique. I’ll get this fixed right away.