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To use, select the first image in the catalog, then go to Image->Toggle Background.Then, select the second image in the catalog, and with the Wipe Tool turned on, left mouse button click and drag in the framebuffer window.

 

Background

Toggles the current image as a background. See Background.

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The Pixel Readout window gives you control of the channels displayedview, pixel remapping, as well as information regarding the current pixel that is under the mouse cursor, including pixel coordinates and pixel values. You can lock the current pixel readout by going to View->Lock Pixel Readout (Default hotkey: M). The remap menu allows some post-processing to be performed on the image (re-mapping) before it is displayed. This does not alter the pixel values in your images. See Remapping for more information.

The channel view shows which of the image channels are currently visible and the options are RGB (normal color) Red, Green, Blue, Alpha (if present) and "Luminance".

Other

Right-clicking in the image area of the window also provides access to the menus. Other windows that are accessible on the "Window" menu such as the "Console", which provides python scripting access to "it" are not dockable and appear as top level windows.

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SpecailItFeatures_Views
SpecailItFeatures_Views
Views

Views in "it" are a combination of zooms, pans, pixel aspect ratio and view mappings. By default all images in a catalog share a view. This is convenient when you want to step through a shot that you've rendered to "it" (hot key PageUp/PageDown). When you zoom in and step to the next frame in the shot the zoom and pan remain the same. However, sometimes you'd like to be zoomed way in on one image to look at some feature and then flip between that and a zoomed out image. "it" accommodates this with Custom View. When you turn on Custom View for an image, that image then has its own zoom and pan, independent of the other images in a Catalog. Custom Views are saved if/when the Session (or Catalog) is saved.

Image Added

Pixel aspect ratio is useful when working on projects that generate non-square imagery. One example of this is the film format Cinemascope. In some pipelines you might decide to keep your digital files in a format where a pixel is half the size in the horizontal direction than the vertical. 'it' allows you to specify this in the view so that on your monitor images look normal. This menu is fully configurable from your it.ini file including the names on the menu and the aspect ratio of the pixels. You may also attach short cut keys to different aspect ratios even if you customize this menu.

 

Recent Bucket Markers

When 'it' is being used as the destination for a render it will display a rectangle around each bucket as it arrives. The indicator will fade over a few seconds. This is useful when an image in being refined as it is sometimes difficult to see what part of the image the renderer is working on. This feature can be toggled on and off and the color of the rectangle can be altered in the preference dialog.

Image Added

 

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SpecialItFeatures_Background
SpecialItFeatures_Background
Background

Any one image in a Catalog can be set to be the Background image. When you then select other entries in that Catalog, the displayed image is the result of compositing the selected image over the nominated background. To toggle the current image to be a background image, use Image->Toggle Background. The icon next to the image in the Catalog will then light up.

Image Added

 

Pixel Readout

When you bring up the Pixel Readout "it" provides a channel view, a remap menu, a pixel location and value readout. The pixel read out is self-explanatory. The remap menu allows some post-processing to be performed on the image (re-mapping) before it is displayed. This does not alter the pixel values in your images.

The channel view shows which of the image channels are currently visible and the options are RGB (normal color) Red, Green, Blue, Alpha (if present) and "Luminance".

 

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SpecailItFeatures_Remapping
SpecailItFeatures_Remapping
Remapping

The remap menu shows the color space that your image is in. Typically this would be linear for rendered images and sRGB for 8 bit image files. By default "it" chooses the image space of the image and when it does this the image space is preceded by a *. You can use the menu to override "it"'s choice (the * indicator will go away)

Image Added

"it" supports view mapping output images to accommodate your workflow of choice using the OpenColorIO system (http://opencolorio.org). Your view mapping defaults can be set for images rendered to "it" as your framebuffer (regardless of bit depth) or for imported images (with different mapping for different types, if necessary).

There are several important things to remember about remapping:

  • Remapping is applied only for viewing files. It is not burned in. There is a prefence for controlling whether the mapping is applied when images are saved. This option is controlled on a per-Catalog basis so it is important to note that when changing this preference it will only affect new Catalogs. Each Catalog can also be individually set to burn in on save or not.

  • Images rendered via RenderMan are, by default, in linear space, unless an exposure is applied to the output (which can be done in RfM via the Output Settings tab of the RenderMan controls).

    If you do apply an exposure to your output, be sure to make the proper adjustment to the default image mapping for rendered images.

  • The OpenColorIO setup can be changed via your it.ini, though, as always, we strongly recommend making the changes in a site-specific surrogate ini file, referenced via RMS_SCRIPT_PATHS. "it" will also use the environment variable OCIO if it is set to find the OpenColorIO config file.

A special entry on the remap menu is the Shadow Map option, which is useful for viewing shadow map files. These files can have huge ranges that are well beyond zero to one, so the traditional way to display these has been to rescale the min and max values to zero and about 0.9, and then invert them with (1 - val).

 

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