World Lighting Breaks With Custom Day Lengths

[FlamingTM]

Like the title says, world lighting completely breaks with custom day lengths. In the world I'm currently playing in, the length of a day has been extended from 20 minutes to 30 minutes, and a few seconds after running /time set 12700, the world falls into shadow.

Here's the world at 12700 ticks

Here's the world at 12800 ticks

Also, I'm using the latest public version of Complemetary Reimagined.

[EminGT]

What method you are using to extend the day length?

[FlamingTM]

Using a datapack I took the day timeline, and extended all the values by 50%
So like a full day period is now 36000 ticks, and the intervals of each event is extended by the correct ratio to account for that.

[EminGT]

Can you send me an example data pack so that I can test?

[FlamingTM]

timeline_pack.zip

[EminGT]

Can you try enabling shadows back in the shader pack settings? Without shadows the shader can't know about the sun/moon location and needs to use ticks as the only time source

[FlamingTM]

I already had shadows enabled in my settings. Though, just to be sure I maxed out any setting with 'shadow' in its name, and then switched the shaders to the 'Ultra' preset, but those had no effect on this.