On the Compare and Options tab, you can compare two renders using several different methods and set additional render display options.
Compare
The following options are available:
| Compare With |
Select one of the following:
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Second Selected Image
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Compares two different rendered images. Press Ctrl and select two thumbnail images to compare.
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Selected Image's Output Channel
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Compares the original rendered image with the image after image processing options have been applied.
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| Apply Image Processing |
Turns options set on the Image Processing tab on or off for the compare operation. |
| Difference |
Calculates the difference between each pixel value of the two images and displays the difference as a grayscale representation. Black indicates no difference between the two pixels. The shade of gray lightens as the difference increases, with white representing the maximum difference. Select one of the following:
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Luminosity
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Hue
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Saturation
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RGB
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Red
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Green
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Blue
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| Difference Scale |
Controls the scale by which Difference is displayed. Enter a value between 1 and 10. |
| +/- |
Uses color, rather than a grayscale, to discern between positive and negative differences between pixels. Available when Difference is activated. |
| Show Channels in Color |
Shows Red, Green, and Blue channels as colored versions of themselves. When +/- is cleared, shows only the channel color.
When +/- is selected, uses an additional color to discern between positive and negative differences.
Available when Difference is activated.
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| Compare Mode |
Select one of the following:
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Wipe
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The two images are overlaid and the top image (the first selected image) is wiped away, revealing the second selected image. You can select a Horizontal or Vertical wipe method.
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Spotlight
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The two images are overlaid and the cursor turns into a spotlight which reveals the second selected image. You can control the size of the Spotlight Radius.
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Side by Side
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Displays two half-width images that can be scrolled. When selected, options appear allowing you to Stack Vertically or Stack Horizontally.
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Options
| Display Channels |
Displays individual Red, Green, or Blue color channels. |
| Display Channels in Color |
Displays individual color channels as colored versions of themselves. When cleared, individual channels display as grayscale representations.
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| Show Transparency Background |
When enabled, images that contain an alpha (transparency) channel display transparent areas as a white and gray checkerboard. This option is available for images that are not high dynamic range (images loaded from your computer rather than rendered images). |
| Show Clipping |
Displays zebra stripes over overexposed areas of the image. You can use this feedback to help you adjust the white levels and tone mapping. |
| Max Render Images |
Determines the maximum number of renders displayed in the Final Render window. When the number of renders exceeds this value, the oldest render is deleted. |