The hatch will always render as raster and create an opaque background. All the hatches in ConDocs are raster images, even if you force it to Hybrid it will still render as a raster and give you the opaque background. As for the solid black hatch, this typically happens because you have an object like a ground plane that is very large that is being hatched. Go to the SketchUp Hatch A or B tab in that is giving you the issue. Set that view current, you should be able to see what object is out of place and shouldn’t be on in the scene. This is usually caused by a ground plane that is untagged or on the wrong tag