I am new to SolidWork2018. I download an STL file from Thingiverse and I am trying to put a logo into the model. Everything open fine and the model displayed correctly in SolidWork also. I have use the sketch tool to create created the design (I am pretty sure its a closed design) onto the model, but everything is shaded and I was not able to use Extruded Cut to cut the design out. However, I am able to use the extruded tool. Did I mess up somewhere? I also find out that under Graphic all the pieces are marked "(Closed)" does that affect anything? Here is a Screen recording of the issue I run into: Cant use the Extruded Cut? - YouTube Thank you for helping.