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Rendering Methods ¶
The LOPs viewport can be set to interactively render with Karma, or any available render delegate. |
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Stand-alone USD viewer, which is a standard part of the USD library. |
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Pane for interactive and background rendering, with network snapshots included. |
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Writes out temporary USD files, and renders them with |
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Streamlined rendering of USD scenes with PDG. |
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Command-line rendering utility. |
Stats ¶
Karma and husk provide useful statistics for inspecting renders. A sub-set of the stats can be visible interactively in the Render Gallery. However a comprehensive report can be generated using the renderstatsreport
commandline utility.
Tip
For best results, adding the “Optimization AOVs” Quick Setup can provide more data to the report.
Overview of stats available to Karma and Solaris |
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Generate image with baked-in stats. |
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Produce a self-contained HTML report from an image’s stats. |
Logs ¶
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Add the Log Viewer pane to your desktop, if it’s not already present in your Houdini session, to inspect render output.
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Karma defaults to a verbosity level 3, which provides a good balance of info, without becoming overwhelming or impacting performance.
Misc ¶
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The only way to “freeze” Karma’s random number generator (RNG) is to add the commandline argument
--lock-random 1
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Karma supports cryptomatte; see the Karma Cryptomatte helpcard for more details.
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When USD 23.11 was released, a new guide for rendering was included: https://openusd.org/release/user_guides/render_user_guide.html. This is a valuable resource, but keep in mind it may refer to features that do not apply to Houdini 20.0 or earlier.