Use lower resolution photos and images in your models. Textures and images saved with SketchUp are raster files with varying degrees of pixel density. This variation can affect file size. You can purge unused materials, or you can use a lower resolution material.In the Materials panel you can identify materials referenced in your model by a small white triangle. You can Purge Unused from the commands in the Materials panel.

With 3D Warehouse you can download materials directly into your models, or as standalone .skm files.To download a material from 3D Warehouse into a SketchUp model, follow these steps.