Alternatively, you can use the ATI Cubemap Generator to produce Cubemaps. One of the advantages to using this tool is its ability to produce 16-bit floating point Cubemaps. There are, however, the following caveats to consider when using this tool:
- This tool has officially reached the end of its life and is no longer supported by AMD.
- The tool uses a Y-Up world orientation, meaning that you will have to consider some axis shifting to make Cubemaps that will work with UE4.
The tool is no longer available for download directly from AMD, but can be found on Google Code Archive here.