Have you ever stuck a decal on a window or a wall? In SketchUp, sticking an image on a face is even easier than those decals, because digital images don’t wrinkle or trap air bubbles.
Technically speaking, SketchUp enables you to import images that are already on your hard drive or grab images from Google Street View.
If you import images from your hard drive (select File > Import to see the Open dialog box, shown in the figure), you can import the image as an image, a texture, or a matched photo.
Here’s what those options mean in terms of what you can do with the image in your model:
- Import the image as a basic image, and SketchUp enables you to place the image anywhere in your model. You can then move, rotate, scale, or stretch the image.
- Import the image as a texture, and you can apply the image to an existing face. However, you also gain access to all the materials and Position Texture tools. These tools are introduced in Adding Colors and Textures with Materials, but that article focuses on tiled images. In this article, find out how to do special techniques with a single image, such as wrapping an image around corners, wrapping an image around a hidden face on a cylinder, or projecting an image onto a face. When you project textures, you can apply them to curved surfaces.
- Import the image as a matched photo, and you activate SketchUp’s Match Photo tool, which enables you to match a photo of an existing building to a model of that building or draw a building based on a photo. Match Photo enables you to apply images to buildings two faces at time, using the corner of a building or room to apply a 2D image onto a 3D model. Unlike images or textures, which work best with rectangular images and faces, Match Photo works well with non-rectangular building shapes, such as angled roof lines. Learn all about Match Photo in Matching a Photo to a Model (or a Model to a Photo).
Don’t have the images you need on your hard drive? No problem — if you can find the building in Google Street View. SketchUp enables you to capture images from Google Street View and import them into your model. Find out the details in the upcoming section on Google Street View.
If your model is spherical, these tools likely won’t work well for you. The one exception is projected textures, which you can apply to curved (or seemingly curved) surfaces. (For details about how SketchUp makes flat faces look smooth, see Softening, Smoothing, and Hiding Geometry
Understanding image basics
Digital images come in myriad file types and sizes. SketchUp supports the image file formats outlined in the following table. Some formats may be more appropriate than others for certain types of images and applications.
|Microsoft Windows and Mac OS X
||Mac OS X
|JPEG, PNG, EPS, TIFF
||PDF, PICT, PSD, SGI
An image’s size is referred to as its resolution. An image’s resolution reflects how many pixels the image contains. The resolution of an image depends on the image source. Typically, images captured with a digital camera, especially a dSLR camera, have very high resolutions, and images downloaded from the web have low resolutions. You can check an image’s resolution in an image editing program, such as Photoshop.
Tip: The higher an image’s resolution, the more detail you see in the image. However, a high resolution also makes the image file bigger, which in turn makes your SketchUp model file bigger. Aim for the lowest image resolution that still shows the image’s detail clearly in your model. Also, JPEG and PNG file types use compression algorithms that also help lower an image’s file size.
Digital images and SketchUp models are so diverse, it’s difficult to give specific recommendations here. However, here’s an example to illustrate how you might find the sweet spot for an image. Say your image was captured with a digital camera in a JPEG or JPEG+RAW format. Try saving a copy of your digital image at a resolution of 72 ppi (pixels per inch) and in the JPEG format. If you model dimensions aren’t very large, you may want to reduce the image dimensions as well (the width and height in pixels). Then, import the image into your SketchUp model and see how the image looks. If you save a copy of the original image, you can always go back and try different settings in your image editor until you find the resolution and dimensions that work well with your SketchUp model.
Importing a 2D image
To import an image from your hard drive into a SketchUp model, follow these steps:
- With your model open, select File > Import.
- In the Open dialog box that appears, navigate to the image file on your hard drive and select it. If you don’t see the image you’re looking for, make sure All Supported Image Types is selected from the Files of Type drop-down list.
- Select an option for importing your image: Use As Image, Use As Texture, or Use As New Matched Photo.
- Click the Open button and your image appears in your model.
If you selected the Use As Image option, your image appears in your model as an image entity with a bitmap image applied to a face. Here are the basics of working with image entities in your model:
- To place the image entity, click anywhere in your model to place one corner. As you move the cursor, the image entity grows or shrinks in size. Click again to place the opposite corner. SketchUp maintains the image proportions by default; to deconstrain the proportions as you place the file, hold down the Shift key.
- To move or rotate the image, use the Move or Rotate tool.
- To resize the image after you’ve placed it, use the Scale tool.
The following figure shows an image placed on a model’s ground plane.
Applying a texture to the side of a building
When you apply a photo as a texture instead of an image, you can’t place the image anywhere in your model. You need to have a face already drawn to which you can apply the image. However, you do have a little more control over the texture’s positioning on the face.
Tip: Sometimes it’s useful to subdivide a face on the side of your building into smaller faces before you apply a photo texture. This is especially true for very long street-facing walls that are difficult to see in a single photograph. Use the Line tool to draw edges that subdivide a face.
The following steps walk you through the process of applying a photo texture to flat face and offer a few tips along the way:
- Select File > Import and select Use As Texture. (See Importing a 2D image for detailed steps.) Or grab an image from Google Street View.
- Click in the lower-left corner of the face that you want to photo-texture.
- Click in the upper-right corner of the face to finish applying the image.
- (Optional) If you need to stretch the image or adjust its position, context-click the texture and select Texture > Position from the menu that appears. Then context-click the texture again and deselect Fixed Pins, so that the Position Texture tool is in Free Pin mode. You can then drag the yellow pins to each corner of the face to stretch the image or otherwise apply it to the face more precisely. Click outside the texture when you’re done.
Wrapping textures around boxes and cylinders
After you import an image as a texture, you can wrap it around an existing box or cylinder, sort of like wrapping paper.
Follow these steps to import an image and wrap it around a box:
- Select File > Import.
- In the Open dialog box, navigate to your image, select it, select Use As Texture, and click Open.
- Click on the lower-left corner of the face on which you want to start wrapping your image.
- Then click the upper-right portion of the face. This places your image, as shown in the following figure.
If you need to stretch or reposition your image after you place it, context-click it and select Texture > Position. For details about the Position Texture tools, see the section on repositioning textures in the article Adding Colors and Textures with Materials
- Select the Paint Bucket tool ().
- Hold down the Alt key (Microsoft Windows) or the Command key (Mac OS X) to switch to the Eyedropper cursor.
- Click the texture that you applied to the face. The Eyedropper samples your photo.
- Release the modifier key to return to the Paint Bucket tool, and click an adjacent face or faces in your model to wrap the image around it, as shown in the following figure.
When you wrap a material around a cylinder, the steps are the same. However, because a cylinder is made of several faces that are hidden and smoothed, your image may look clipped at first, like the fish image in the following figure. This is how the image looks after placing the texture by clicking the bottom edge of the cylinder and then the top edge.
However, after you sample the texture with the Eyedropper cursor and click the cylinder with the Paint Bucket cursor, the whole image wraps around the cylinder, as shown in the next figure.
Projecting textures onto a curved surface
In SketchUp, projected textures are images applied to faces as though a slide projector is projecting the image onto your model. Projected textures enable you to apply a texture over a curved surface. This feature is particularly useful for applying a topographic image over a site model, because topography is rarely flat like the side of a building.
If your curved surface is a group, open the group’s context before you follow these steps. Alternately, you can explode the group and then turn your curved surface back into a group after you complete the steps. For details about organizing geometry into groups, see Organizing Your Model
To project a texture over a curved surface, follow these steps:
- Draw a single, flat face that matches the dimensions of your curved surface. The following figure shows a top view of a flat surface over a blank terrain.
Select the flat face and turn on X-Ray mode (select View > Style > X-Ray) so you can see the curved surface under the flat surface.
- Import a photo as a texture, as explained in the earlier section Applying a texture to the side of a building. (Remember that to see this texture, the Face settings in the Styles browser must be set to Display Shaded Using Textures. (See Creating and Editing a Style for details about face styles.)
- (Optional) If needed, adjust the position of the texture so it matches your flat face. For example, in the following figure, you see the texture in Free Pin mode after each pin was dragged to a corner of the flat face. See the section on repositioning textures in Adding Colors and Textures with Materials for details.
- Context-click the texture that you applied to the flat face, and from the menu that appears, select Texture > Projected. This step transforms the texture into a projected texture, so that the remaining steps work.
- With the Select tool (), select all the faces in your curved surface.
- Select the Paint Bucket tool ().
- Hold down the Alt key (Microsoft Windows) or the Command key (Mac OS X), and with the Eyedropper cursor that appears, click the projected texture to sample it. Release the modifier key so the cursor turns back into the Paint Bucket.
- With the Paint Bucket cursor, click the curved surface selection to apply the projected texture to all the faces.
- Delete the flat surface, because you no longer need it. The following figure shows the projected texture after it’s applied the curved surface and the flat surface is deleted.