You should always download a 3DWarehouse model into a separate blank model and examine it to see how “heavy” it is before importing it into your own model. The models are not quality-controlled, and many of them are extremely detailed, suitable only for extreme closeups or when that object is the sole content of a model. For the most part the 3D Warehouse contains models not bare materials, though the models may contain interesting materials.Elevate your architectural designs, presentations, and projects with Raylectron’s powerful rendering capabilities. I think you will find that the idea of “good” is quite subjective and what works best for you will depend on your individual skill level and goals. Raylectron Render for SketchUp is your gateway to creating extraordinary visual experiences. You can search the forum for recommendations on renderers, as this is a frequent topic. In general, good rendering depends on a lot of details such as light types and placement, which makes even the simplest renderers somewhat complicated and usually requires a few tries before you get an image you really like. There are many renderers compatible with SketchUp.For photorealism you need either an extension or an external renderer. No, the only renderer built into SketchUp is a simple shader.