Performance regression in 0.10 when increasing skybox resolution

[jirisvd]

I noticed a significant drop in performance in 0.10.0 when increasing AtmosphereSettings resolution to 1024 or 2048 from the 512 default as opposed to 0.9.1 where the performance difference was negligible.

I took the basic example, turned vsync off and measured frame time (tested with rtx 4070 super):

Resolution	0.9.1	0.10.0
512	0.6ms	0.6ms
1024	0.6ms	1.5ms
2048	0.6ms	5-6ms