Has anyone else come up with this?
In the trees, other things appear when there is rain, it seems to be a problem of mixing.

I have several mods on,
List of my Mods:
[mod0000_MergedFiles]
[modBootstrap-vanilla-patch]
[modColoredMapMarkers]
[modBootstrap]
[modBootstrap-registry]
[moddisablestorybooks]
[modFixLabMusic]
[modHDReworkedProject]
[modHDReworkedProject2]
[modHDReworkedProject3]
[modHDReworkedProject4]
[modNitpicker]
[modHunterInstinctPatch]
[modFixToxicFaceQuen]
[modFixRoachTail]
[mod_VenomousSwordsFix]
[modHideCursorAfterDialogueTimeout]
[modDecoctionPotionSoundFix]
[modDLCArmourFixes]
[modCammTrophyFix]
[modAncientLeshenDecoctionFix]
[modNoStairRolling]
[modSellContracts]
[modFixNGPWolfRecipe]
[modViperStandFix]
[modFriendlyHUD]
[modMergeSlotsAndSortEverything]
[modFontAlexandriaBold]
[modMoreTransparentMenu]
[modNewMenuVideo]
[modAutoLootMenu]
[modFoodAndDrinksArentPotions]
[modBetterTrophies2_0]
[modHorseGallopInCities]
[modSilverSwords]
[modSharedImports]
[modIncreasedDrawDistance]
[modMoreShadows]
[modNoDirtyLensEffect]
[modSmoothGrass]
[modAutoApplyOilsMenu]
[mod2kGrassTextures]
[mod4kCloudsBlurry]
[modToggleCatNoPotion]

It had never happened, the lighting and atmosphere mods are not because before installing them it already appeared.
Some answer?

Thanks

Hi Snow.

It looks to me like an issue caused by anti-aliasing the rain particles.
One or more of the graphics mods you have installed are probably in conflict with the default anti-aliasing method the game uses.

In that case it might help to turn anti-aliasing off from the in-game settings or trying to uninstall graphics mods one by one/ (in batches) in order to find the one(s) that is (are) causing the issue.

Cheers.

Thank you very much for the guidance, I will try everything you say.
Cheers.