KTX texture problem

[johntdaly7]

Thanks for the timely response.
In terms of reproducing the issue, I mean encoding the compressions of babylon’s given skybox jpgs into ktx or whatnot via PVRTexTool and getting those compressed images to load in when creating a new skybox.

This is my playground:

Babylon.js Playground

The textures and encoding strategy I am using are shown previously in this thread.

The point of the issue:
Right now the skybox alone is seemingly causing 200MB of memory usage in our app. We want to shrink that as much as possible, so we are compressing the textures.

I tried various compression encodings in the PVRTexTool GUI, to no avail. They load without error, but they do not render in the scene.
I followed the suggestions outlined here:

How to use compressed KTX format of skyboxes?

I’ve put together a playground where you can see it break once I request compressed textures for skyboxes, regardless of whether the KTX files are there or not. Does anyone know how I can make skyboxes compressed on devices like the iPhone?

and then here:

Basis support for skyboxes?

I’ve been unable to get basis textures to work with skyboxes. Tried 2 methods: Simply using .basis images in place of my current png textures for the skybox and using CubeMaterialCreateFromImages -No errors, yet nothing shows up, as if it decided not to transcode, or failed to update the texture after transcoding maybe? Using basis cubemap format. (With CreateFromPrefilteredData) While this worked (loaded), the images were super distorted/color issues. Also noticed on the basis example playgr…

but it seems the playgrounds on those posts are dead ends.

So I’m wondering if there is a compatibility issue, if this is an issue on the Babylon side, or if I am encoding them incorrectly. Thanks!