See 3.6 Capturing framebuffer content for more information about capturing frames.

Selecting a framebuffer in the left-hand list brings up a list of the attachments used in that framebuffer in the lower list. If relevant, it also brings up histograms displaying the overdraw or shader map data. To bring up a larger view of an attachment, select it in the lower list. For multiview rendering, the views are displayed as separate selectable elements in the attachments list. You can then mouse over the attachment for additional information. Double-clicking the main image opens the attachment in an external editor.

In certain situations, you might want to view the framebuffer with different alpha options. The following alpha modes are available:

Use Alpha

Does normal alpha blending using the alpha values in the framebuffer.

Ignore Alpha

Ignores the alpha values in the framebuffer and sets the alpha value for each pixel to its maximum, that is, fully opaque.

Visualize Alpha

Ignores the color information in the framebuffer and shows the alpha values for each pixel. The alpha values are shown in a range from black (minimum alpha or fully transparent) to white (maximum alpha or fully opaque).

For a captured frame, you can step through the sequence of draw calls one at a time and observe how the final scene is constructed.