A bunch of suggestions, none of which are significant enough to warrant their own post (also it would be spam if I posted them seperately)

[ArgentVASIMR]

Sun and Moon:

1. Sun and moon should have maximum angle tilt at 170, not 60. Reasoning for this is for those interested in an (ant)arctic snow world experience, where sunrise and sunset often get as low as that.
2. Optional "seasonal" sun/moon angle tilt. Every N days, the angle shifts from one end to the other end of a configurable range.
3. Stars should follow the set sun/moon angle. They currently do not, and instead follow the same 0-degree tilt that Reimagined uses by default.

Clouds:

4. Clouds should fade away within contact of a configurable range of distance from solid blocks (I'd suggest 6), and with a configurable opacity gradient range of blocks (I'd suggest 4). This would create a very realistic effect, and it would make clouds going through and out of mountains look cleaner. Should be applied both parallel and perpendicular to the clouds' path.
5. Configurable internal cloud softness (and opacity) with Complementary Reimagined. I feel the transition between going into and out of a cloud is a bit too fast from edge to interior, so I'd like to adjust it.
6. Passing in and out of a Complementary Reimagined cloud should softly fade in and out vertically as it already does horizontally. This could be a bug, but at the moment when the camera view goes from inside the cloud to immediately above or below it, it's a very abrupt change in colour. Looks really bad when sprint jumping across a mountain. Alternatively, suggestion 4 could be used to accomplish this, but applied to entities.

[EminGT]

These are some nice suggestions! I would actually love to implement every single one, but unfortunately there are reasons for them not already being implemented:

1. Having extreme sun/moon angles breaks the way Complementary does all the atmosphere and lighting timings. It would take some time and effort for me to rewrite everything in a way that doesn't depend on sun/moon angles.
2. Sun/moon angle works in way that the shader file first tells Iris/Optifine about which sun/moon angle it wants before the shader is loaded, and then Iris/Optifine loads the pipeline, and then the actual shaders get loaded. This system unfortunately isn't flexible enough to allow sun/moon angle changes without recompiling the shaders every time.
3. Stars following the sun/moon angle would add some extra computations, and the fps cost of the computations (even though very low) might be more important than this inconsistency which isn't really noticeable without changing the settings and comparing.
   4, 5, 6) The unfortunately harsh way the Reimagined clouds are handled are all thanks to the optimizations that were put in place to make them run fast. Implementing any of these suggestions would cost a significant amount of performance.

Still thank you very much for your detailed and thoughtful suggestions :)