How can i have a high resolution Skybox ?

Development Rendering
, , ,
1

Hi everyone, so i tried to change the default skybox to have a space skybox.

I used Spacescape to make a custom skybox of the space, and I got 6 .png pictures in 2048*2048.

Then I rotate my images and make a Cube map with the Nvidia Plugin for Photoshop, with those parameters :

http://img15.hostingpics.net/pics/889694parameters.png

But i don’t know why when I load the Cube map in EU4 the quality is terrible
Here is what I have in UE4 :
[Terrible images][2]

And here is the quality of my images after Spacescape exportation :
[Nice images][3]

I don’t know why but I can’t get a nice Cube map, I tried with many parameters in the Nvidia Plugin but nothing to do and I don’t know how to change the parameters in UE4 to get a nicer Cube map, can you help me if you know how to change that please ?

2

Did you find a solution to this? Im stuck with the same problem like many others too (given we had this topic a while ago in the unrealdev subreddit without coming to conclusion)

3

Hey Florian -

This is an issue of your Cubemap Texture Size. If you look at the documentation on Texture importation here, https://docs.unrealengine.com/latest/INT/Engine/Content/Types/Textures/SupportAndSettings/index.html

You will see that the Engine only support up to 4096x4096 with DirectX hardware only supporting resolutions up to 8192x8192. What I would try first is to see if you can get your cubemap down in size in which the whole map is only at most 8192 with a much better size of 4092.

Let me know -

Eric Ketchum

4

When you open up the texture in UE4 (Notice your terrible image example,) You’ll see all kinds of parameters on the right. What you need to do it go to Level of Detail, drop down ‘Mip Gen Settings’ and select ‘NoMipMaps’

I had this same issue, this option will give you optimal quality when using the 2048x2048 map size.

5

I’ve also been having this issue and to be honest even 4096x4096 with NoMipMaps still doesn’t really cut it in terms of the quality you’d expect from looking at the image on Photoshop. Anyway, maybe that’s because I’m running it on Oculus Rift. Do you think it would have to be even bigger, or perhaps my SkySphere needs to be a certain size?

6

Hello -

What is your Texture Compression settings and sRGB set to?

Eric Ketchum

7

Set mipmap settings to “no mipmaps” in asset window in UE helped.