Currently if you use CTS with the mod vistas installed the Cubemap doesn't render and you get a black background instead.
It could be nice to be able to put something in the CTS or that this mod would detect if vistas is installed and allow vistas to function properly.
If the 2 mods are installed and no CTS is defined for SGM then vistas can work currently.

I'm using :
SGM 2.1.0
TerraformersMC/Vistas#24

Here are my CTS file and my vistas RP
cts.zip
Base Resource Pack 3.2.zip
(i had to put the cts.groovy in a zip for gh)