Just opening a tracking issue for an unrestricted depth range feature, which could allow any/all of the following (% backend support):

• "unclamped depth" output from rendering (via fragment shader output, depthClearValue, or unclippedDepth).
• writeTexture/copyBufferToTexture into "depth32float".

Backends:

• Vulkan: VK_EXT_depth_range_unrestricted
• Metal: ?
• D3D12: ?

The previous discussion is in #789.