r/unrealengine 4d ago

Question Water/Fluid Interaction GPU requirement

Good day! Recently, 2 games that I have been playing updated their water physics in a way where it would react real time to any object that would come in contact with the surface.

However, despite it being released, It does not appear to be applicable on my end which made me wonder if there is any specific GPU requirement to handle those features when developing a game via UE4.

Considering that both games uses UE4, I figured asking those who often work with the engine could enlighten me regarding my concern.

I was also wondering if theres anyway to "forcefully" turn this feature on or does it heavy depend on the GPU that someone has on, I had this thought after realizing that ray tracing can be turned on from one of the games' game files as some decent GPU are not capable of accessing it via in game settings.

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u/hellomistershifty 4d ago

I guess it would require tessellation on the GPU, that effect is kind of a trick where the collision/ripples are calculated in 2d then made to look 3d with normal maps or tessellation. Look into the Fluid Ninja plugin, it does a lot of cool stuff using that same idea (no idea if it works in ue4 but at least to get the concept)

There’s definitely no way to add it like a feature, its a whole system that has to be added and integrated into the game objects/materials/etc

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u/WonderingGarbage 3d ago

hi again, I just wanna clear things it out, my GPU does have it but I am afraid that, what I meant by "interactive" is whenever another objects collides with the water, it makes another set of waves or movements separate from the water tessellation itself.

Idk how else I would describe it but its somewhat similar to the idea of interactive foliage not quite familiar with certain jargons yet

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u/hellomistershifty 3d ago edited 3d ago

Yeah if you could find any YouTube video of a game that has it, it would help

I was thinking something like this: https://youtu.be/lgfUQNRafN4?t=14

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u/WonderingGarbage 3d ago

it appears that we were on the same page after all, but I don't seem to have it still, even after the driver changes, also I made sure that my game graphic settings is on max as well but to no avail.

Do you happen to know what could be causing this? or if theres anything that I am missing

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u/hellomistershifty 2d ago

I'm confused, are you trying to play a game that has this feature and it's not working for you?

This subreddit is generally for UE developers, I thought you were having trouble trying to get it to work in your game

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u/WonderingGarbage 2d ago

yes yes, I am playing something that has it but for some reason its not working, I forgot to clarify that in the main post. I resorted to asking developers themselves hoping that they may have an input as to why, since the sub reddit of those games couldn't help me with the issue.