Doc:2.4/Manual/Render/Display

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Show the Render Window

The Render window can be invoked/shown in 2 ways:

Rendering

Output Options needs to be set correctly. See Rendering for details on rendering itself.

Render → Render Current Frame (F12)

As the title already says, it renders the current frame and shows the Render window.

Render → Render Animation (CtrlF12)

Same for Animation.

Showing

Render → Show Render Buffer (F11)

Pops up the Render window and shows the last rendered image (even if it was in a previously opened & rendered .blend file).

Render → Play Back Rendered Animation (CtrlF11)

Similar as for the single frame, but instead plays back all frames of the rendered animation.

Render Window usage

• A - Show/hide the alpha layer.
• Z - Zoom in and out. Pan with the mouse.
• J - Render buffer switch. This allows you to keep two images in the render window, which is very useful for comparing subtleties in your renders. How to use it:

1. Press RENDER or F12.
2. Press J to show the empty buffer (the one we want to “fill” with the new image). Note that you can keep one image in a buffer and compare it with subsequent renders.
3. Make your changes.
4. Render again.
5. Press J to switch between the two renderings.

• Esc - Cancel a running render process
• LMB - Clicking the left mouse button in the Render window displays information on the pixel underneath the mouse pointer. The information is shown in a text area at the bottom left of the Render output window. Moving the mouse while holding the LMB will dynamically update the information. This information includes:
  • Red, Green, Blue and Alpha values.
  • Distance in Blender Units from the camera to the pixel under the cursor.

See also

• Rendering
• Render Output Options