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HDRI background pixellated

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Hi there, Does anyone know why is my imported HDRI so badly pixellated? alt text I'm using a 4k HDR imported from Hdri Haven and have been following this tutorial: http://rag3dviz.com/tutorial/hdri-lighting-in-unreal-engine/2/

My material Bp: alt text alt text

What am I doing wrong?

I've tried changing skysphere scale from 1 to 3 makes no difference, no mipmaps is also set within the material

Product Version: UE 4.15
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pixellatedhdri.jpg (92.6 kB)
m-skysetup.jpg (251.6 kB)
skysetup.jpg (308.2 kB)
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asked Aug 26 '18 at 02:59 PM in Rendering

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Delta1
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Hi, sorry to necro this old question - expose the advanced drop down arrow under the compression header, and change "Set Maximum Texture Size" to 2048.

UE4 clamps the hell out of HDRI's by default for some reason, hopefully this helps.

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answered Feb 12 '19 at 02:55 PM

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Kogoshi
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avatar image Seehr Feb 18 '19 at 02:11 PM

It's not for some random reason. Up until today, HDRI images were used mainly for baking light and reflectiosn in videogames. That's the reason of compression quality and aggressivness, since HDRs are usually heavy images. Straight up config from UE is not for thought for high end image rendering as ArchViz requires. UE4 is a Game Engine after all. But it's a great one and allows it to be used for cinematics also with just a few tweaks around.

If you don't want your texture to compress make sure you select the option in the texture edit tab and also change it to never stream.

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