Grass. Strange pixelation over distance.

Mr Significant

So I'm working on KnightFall now, and chief of the project wants me to make a grass. So I did. And what he is worried about is the strange pixelation over distance about 10m. Take a look:





And I dont know if there a thing to be concerned about. Cause I looked after Witcher 3 screenshots. They have less pixelation on grass, but still.




Or its just that screens.

And do I have to be worried about that? Can I make anything about that? Is my grass just too dense on texture ? Or its the engine?

GlowingPotato

Maybe its a mapping issue?

What kind of compression are you using ? how many mips levels ?

Avvi

Yeah, probably far mip maps are blocky.
Are you using alpha test? i. e., value of alpha clipped in shader to 'fully transparent' or 'fully opaque'?
In UE4, I'd experiment with clipping treshold. Default is 0.333, which should was too low for my foliage
and such blocks (as on your screenshots) got included as opaque. But 0.5 cuts them out nicely.

As for the mip maps, I don't know if you can edit them manually. I use only the automatic generation. Fortunately, in UE you can either blur or sharpen the smaller mip levels.

Mr Significant

Im not using alpha test preset in RC Photoshop, because its actaully fucked up. Its making a texture pixelated as hell. Even If I choose 4k, HigherResolution preset.

So im using DiffuseWithAlpha_HighQuality.

How many mips ? all of the RC are generating.

pilotchiao

How can do this ? can do this Grass ?

Mr Significant

What? You need to be more precise

grimsonfart

You could simply use diffuse_HighQ, might fix your problem.

Mr Significant

No, you need a preset with Alpha. How you want to deal with foliage if it isnt maps with alpha's?

grimsonfart

You don't need that preset as long as you have an alpha map in your channel. Adjust the alpha in the material editor as you have done a million times. Works for me and should work for you