Sketch Up has announced their first annual Halloween Challenge. You can pick three categories: 1:Jack 0′Lantern, 2: Haunted House, 3: Both together. You need to fill out a challenge submission form and upload your model to 3D Warehouse in publicly downloadable format. The SketchUp team will judge the entries on October 28th. Here is a link to Googlemeister’s Amazing Haunted House Walk Through Collection from last year in 3D Modeler.