UE4 Caustics, NvRTX-Caustics


I’m trying to run the Caustics branch from the Unreal Engine fork of Nvidia. The build went fine, I can find the UI boxes for caustics in the editor, but loading the sample projects does not work.

It seems like the materials are not found in the Mesh Caustics demo:

Loading the Povray project starts up with errors:


I had one issue when I ran Setup.bat, though, but the build went fine, so I’m not sure if it is related. It displayed the following error:

Failed to download 'http://cdn.unrealengine.com/dependencies/UnrealEngine-4358751-16521f530c414728b289dbb71f593410/80c1ba699c3de9b0950a5521e587025e7f85f8bb': 
The specified path, file name, or both are too long. The fully qualified file name must be
less than 260 characters, and the directory name must be less than 248 characters. 

Any help or suggestions to fix this would be greatly appreciated.


It seems that the projects stored on google drive are so big that they got corrupted during download for me. Downloading them one by one works.

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