Can Karma Use "Background Image as Matte" like Mantra?

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Mantra has this feature "Background Image as Matte" https://www.sidefx.com/docs/houdini/props/mantra#vm_backgroundmatte [www.sidefx.com]

can karma do the same? how?

Thanks in advance!
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I am looking for this too, do you have any answer?
Edited by qqllzz1017 - 2023年9月2日 00:52:49
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with karma, you can use Foreground Image in camera or editcamera node.look at the camera help. if you need z-composite, add depth aov for the image."depth" not "deep",and rename the aov name as "Pz". and i found the filter zmax is better.
https://vimeo.com/user3971456/videos [vimeo.com]
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How do you use the maximum filter parameter?
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Mr. Luo Qiulin, I tried your method, it is not easy to make.Can you say more specifically?
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