How can I judge if an older GPU will be capable of displaying the H22 viewport? Is it sufficient if it supports Vulkan Api Version 1.3.0, or are there other criteria that I need to ensure?

The H22 Vulkan Viewport doesn't work on an old GPU that I am trying to use on a secondary machine, because it is Missing required features: synchronization2 dynamicRenderingand Missing Required Extensions: VK_KHR_dynamic_rendering VK_KHR_maintenance4. My Api Version is shown as 1.2.162and SwiftShader Device Api Version as 1.3.0.

Does this mean that a GPU that supports Vulkan Api Version 1.3.0 will be able to display the viewport? Could I use an old GPU that supports 1.3.0 to have the viewport working, even if rudimentarily, in case I ever need it in a bind?

While checking I was surprised to find that Vulkan is not even mentioned once on the H22 System Requirements [www.sidefx.com] page, even though the H22 viewport cannot work without Vulkan. The Supported Cards [www.sidefx.com] page also doesn't mention Vulkan at all.

Where can I find more information about this?

The GPU driver provides the Vulcan interface and its capabilities. If you have a driver version that meets Houdini's system requirements, it will provide the Vulkan core version and capabilities it requires.

Older cards won't be able to upgrade to those driver versions if the manufacturer has EOL'd them, which is why they won't work even if they technically can support Vulkan.

malexander
The GPU driver provides the Vulcan interface and its capabilities ...

That really does clarify things. If this is not already common knowledge, I think it could be beneficial if it were articulated like you have, in the System Requirements page.

Thank you so much.