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I am learning vulkan and found interesting thing: on my home pc I have VK_LAYER_LUNARG_standard_validation layer but on my work pc I don't have it but have VK_LAYER_LUNARG_core_validation instead. What is the difference between them and what should I use?

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From the table in the layer documentation:

VK_LAYER_LUNARG_core_validation validate the descriptor set, pipeline state, and dynamic state; validate the interfaces between SPIR-V modules and the graphics pipeline; track and validate GPU memory and its binding to objects and command buffers

And then just after the table of layers:

In addition to the above individually specified layers, a built-in meta-layer definition has been provided which simplifies validation for applications. Specifying this short-hand layer definition will load a standard set of validation layers in the optimal order:

 VK_LAYER_LUNARG_standard_validation

In some (early) versions of the VulkanSDK releases, VK_LAYER_LUNARG_standard_validation and VK_LAYER_LUNARG_core_validation, were added (but, not the same version). You should probably just update to latest SDK releases (or at least a later and consistent) version on all your machines.

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