Here it is what I want to do:
I have speed tree outside and some apex inside house. There is a WindDirectional actor, when I activate it, it affects both apex and speedtree.
Is there a way to disable wind on apex object?
Also I think that Point Wind and Radius in Wind Direction Source Component are not working at all.
Any help?
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Bump…
I’ve searched for it too and have’nt found a way to do it at this point and, of course, I would like to have an answer too. 
I am in need of this feature too! I need wind to affect only the environmental apex assets and not the ones on my playable character mesh.
Alright. I might have something which seems to work but it requires 4.16 and a very minor tinkering in the engine code.
In the new in-engine clothing tool introduced in 4.16 (which is still experimental by the way), there is a drop-down for Wind Method in the Cloth Config properties. By default it has only one option to be selected which is ‘Legacy’.
Open ClothingAsset.h and scroll to the EClothingWindMethod (Line: 263). You can create a new enum value called ‘None’. Compile the engine and open the skeletal mesh editor again. This time in the Wind Method drop-down, there’ll be an option to select ‘None’.
Explaination of why this works: Wind computation is being done in ClothingSimulationNV.cpp in its UpdateWind function (Line: 1253) using switch case. Any other enum value other than ‘Legacy’ or ‘Accurate’ is going to go to the default case, and no computation will be done.
This does the trick to some extent but I would still like to disable wind on cloth meshes on a per-instance basis in my level maybe through a boolean provided in the SkeletalMeshComponent.
TL;DR
-Get Unreal 4.16 github source of the engine
-Add the value ‘None’(or anything else would do) to the EClothingWindMethod enum in ClothingAsset.h
-Compile the engine
-Select the newly added enum value in the Cloth Config properties in the skeletal mesh editor
Thank you lollalol!
I already have the Unreal 4.16 from Github and I will test soon the new clothing tool with the code you provide to disable wind on assets!
Your explanation seem to be clear enough for me, coding is not in my skills!
surprisingly, I looked into github but somehow, ClothingAsset.h does not seem to have EClothingWindMethod enum.
I will download and look into more closely. BTW, thanks for the good tip!
I see that seems to be strong possibility. I will look into that where it can be found ^^ not a problem at all and hope this enum values approach is simple enough to expand usability as hope!
it seems to be simple solution to achieve but unfortunately, could not find the enum on ClothingAsset,h as described. Any idea? has been moved to somewhere?
Weird. I am on 4.16, and I see the Enum at line 263 of ClothingAsset.h.
Try doing a Ctrl+Shift+F search on the entire solution for EClothingWindMethod
I am on 4.16.0. Maybe the enum has been removed/relocated for the supsequent versions. Sorry mate. Do let me know if you have any updates on this
https://github.com/EpicGames/UnrealEngine/tree/release/Engine/Source/Runtime/ClothingSystemRuntime/Public
Here is the path I can see the ClothingSimulation.h
you forgot to navigate into the Assets folder. The enum is in ClothingAsset.h
it works well to isolate the effects on character clothes against the apex asset on environment with wind directional source. Thanks for sharing good tip!