set_topurl.x3d using X_ITE

X_ITE X3D Browser   Test browser to switch between different backgrounds where each one contains a different topurl image associated with it.

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     Original X3D model: set_topurl.x3d
X3D Examples Archive: https://www.web3d.org/x3d/content/examples/ConformanceNist/BindableNodes/Background/set_topurlIndex.html

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