A Quick Recap !

Because I made a mess of the OP, here are the original links again. First, the WorldBall itself:

• Simple Poser WorldBall - for Poser 6+
• Simple DAZ Studio WorldBall - for DAZ Studio 3 and DAZ Studio 4.5+

As mentioned before these sets both include the first five environments plus a test environment:

• E00 Test 1
• E01 Snow
• E02 Lake
• E03 Sand
• E04 Scrub
• E05 Mars

Environments E01 to E05 all use the same Terragen Classic terrain, but use different texture layers, lighting, atmosphere, clouds and water. The E01-E05 Terragen Classic Source Files are also available.

If you want to try creating your own environment sets there is a "Make Your Own Environment Maps And Light Probes" PDF in Renderosity's Tutorials > Other Software section

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The 3Dcheapskate* occasionally posts sensible stuff. Usually by accident.
And it usually uses Poser 11, with units set to inches. Except when it's using Poser 6 or PP2014, or when its units are set to PNU.

*also available in ShareCG, DAZ, and HiveWire3D flavours (the DeviantArt and CGBytes flavour have been discontinued).