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How do I put a backdrop behind the model that I am creating so that I can compare the picture to the model while editing?

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up vote 33 down vote accepted

As an alternative to Gwenn's answer, you can also use an empty. Empties in Blender now have an image type.

enter image description here

This is very useful as it gives you more control over positioning your references and users coming from other software can use this method as it is the norm for them. (most Max users I know use frozen planes with textures when modeling).

Once added, you have a lot of control over the reference. You can adjust the opacity, scale it, rotate it etc. Much more flexible than the common way using the N panel in the other answer. You can also lock it so it behaves the same way. Another advantage this has is that it's visible in both orthographic and perspective views.

enter image description here

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3  
Very cool addition indeed – onedayitwillmake Jun 3 '13 at 23:31
1  
This is a really great solution. I've been wanting to view my reference photo in the viewport directly on top of my model (with transparency) to compare more easily. By using one of these image empties with transparency, and using object > display > x-ray, you can do so in the viewport even with cycles! Thanks for this. – Qutorial Jul 30 '13 at 14:11

In the View Properties panel (accessed by pressing N), there should be a category called Background Image. To enable it check on the box to its left.

To load an image, press the 'Add Image' button. All of your relevant image and display options are included in that menu.

Background Image menu (from Blender wiki)

However, remember that background images will only be displayed in:

  1. Camera Prespective view (Numpad 0)

  2. Any of the preset Orthographic views which you can access using the keys on the number pad: Front/Back (Numpad 1 or CtrlNumpad 1)

    Right /Left (Numpad 3 or CtrlNumpad 3)

    Top/Bottom (Numpad 7 or CtrlNumpad 7)

Background images will not show in perspective view. To switch between Prespective and orthographic view use Numpad 5

Background images are used for reference only and will not be part of the final render.

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6  
Also note that dragging and dropping images into the 3D view will add it as a background image. – gandalf3 Apr 19 '14 at 1:31
    
When you render it. Can you see it? – Meri Sep 1 '15 at 10:58
    
@Meri No, this is only for editing purposes. You'll have to use another technique for that. – TrakJohnson Sep 16 '15 at 20:13

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