Hi everyone. Pretty simple and newbie question.I have a line in obj context. I'm trying to import it to stage context by Sop import and this weird thing happen. I appears as a flat surface. I have no idea what is the problem.

Looks like USD is applying a default "widths" primvar (with a value of 1) to your curve. You can see the undefined widths primvar in the Scene Graph Details pane when you select your curve. One way to get rid of the ribbon is to right click on the primvar in the SGD pane and Edit Property. A value of 0 will make the ribbon not visible, and you can also just "Block" the property.