Which of the following sentences are correct when converting between .usda, .usdc, .usd and .usdz files? Choose two.

B: The usdcat command-line utility is a standard tool in the OpenUSD toolset designed for inspecting USD files and converting between its two primary formats: human-readable ASCII (.usda) and optimized binary (.usdc). The command usdcat input.usda -o output.usdc directly performs this conversion.

C: The .usd file extension is intentionally format-agnostic. The USD runtime does not rely on the extension to determine the format; instead, it reads the file's header to identify whether it is ASCII or binary. Therefore, renaming a .usda file to .usd is a valid operation, as the file's content remains a valid, readable ASCII layer.

A. The usdzip utility is used to create .usdz package archives, which bundle a USD scene and its dependencies. usdcat is for format conversion, not packaging.

D. Renaming a file does not change its underlying format. A .usda file is text-based, while a .usdc file is binary. A parser expecting a binary file would fail on the renamed text file.

1. OpenUSD Documentation, "Tools - usdcat." The documentation states that usdcat can be used to "convert a USD file from one format to another (e.g. .usda to .usdc)."

2. OpenUSD Documentation, "File Format Plugins - usd." The documentation explains that the .usd extension can be used for either ASCII or binary files and that the format is identified from the file's contents, not its name.

3. OpenUSD Documentation, "Tools - usdzip." This page describes usdzip as the tool for creating .usdz archives, distinguishing its function from usdcat.