Few weeks ago there was quite the kerfuffle about the withdrawal of some reduced-size textures for FSLTL from Flightsim.to

While doing some web research on a related subject, I came across mention of what seems to a viable, if slightly more labor intensive alternative, and a search found no mention of it on Avsim.

Accordingly, I will post a link to the tool, and the community can have at it, as to whether it sucks or not https://izn-flightsim.s3.amazonaws.com/textureoptimizer.html

I also located a video regarding this:

 

As long as you follow the instructions on the linked page, TextureOptimizer works great in my experience.

I use it to make 2048 and 1024 sets for FSLTL.

Edited November 9, 2025Nov 9 by Penz

I may have missed a few episodes, but weren’t decals introduced into MSFS2024 precisely to avoid the need for huge textures? Meaning that if a beautiful detailed logo should be drawn on the tail of an otherwise white body, and it requires 480x240 pixels for the logo to be really sharp, then this is achievable in a smarter way than with an 8k texture covering the rest of the aircraft with many million white pixels.

12 hours ago, Mark1616 said:

but weren’t decals introduced into MSFS2024 precisely to avoid the need for huge textures?

Yes, and over time as models get updated, we'll see the benefits. Most of the good third-party addons are doing this now (Fenix, ini), and it's amazing to see both how detailed and sharp the models are, while not losing any performance. 

The free models will take some time to update, and likely some will never be updated. But that's just the nature of things. SU4 has improved performance so much that I think it will be fine using the older models - there's a lot more headroom now. 

Does this method work in MSFS2024?  I think I read elsewhere that it only works for MSFS2020 (hoping I read wrong).

Seem to recall Nick Needham (Sim forum) always ringing in on folks and their high res textures resulting in poor frame rates. He called them something I don't recall. He said it was lazy. See it still holds true today.

37 minutes ago, MadDog said:

Does this method work in MSFS2024?  I think I read elsewhere that it only works for MSFS2020 (hoping I read wrong).

Only if you are using DDS textures (such as FBW A320 and A380, Headwind or Horizon). Any 2024 native model will use KTX2, for which this method doesn't work 😢

On 11/9/2025 at 5:25 AM, Mark1616 said:

I may have missed a few episodes, but weren’t decals introduced into MSFS2024 precisely to avoid the need for huge textures? Meaning that if a beautiful detailed logo should be drawn on the tail of an otherwise white body, and it requires 480x240 pixels for the logo to be really sharp, then this is achievable in a smarter way than with an 8k texture covering the rest of the aircraft with many million white pixels.

But knowing people, they will release a livery with 8k decals. Just take a look into flightsim.to offerings 🤦‍♂️

Does anybody know of a converter able to resize KTX2 textures?

13 minutes ago, Luis Hernandez said:

Does anybody know of a converter able to resize KTX2 textures?

An AI search says this:

Resizing KTX2 textures involves decompressing them to a standard format (PNG/TIF/JPG), scaling them, and re-compressing them back to KTX2/Basis Universal. Use tools like (Khronos Software), Nvidia Texture Tools, or specialized glTF/GLB optimizers to perform this resize operation to optimize GPU memory and file size.

 

Methods for Resizing KTX2 Textures:

• **toktxtoktx --basis`.
• Nvidia Texture Tools Exporter: Can be used to convert KTX2 to intermediate formats like PNG/TIF to resize them, then re-compress them.
• glTF/GLB Optimizers: Tools such as (AllenDang/gltf_opt) can directly resize textures within 3D models and convert them to KTX2 with Basis Universal compression.
• A-Frame/GLTF Pipeline: When creating GLB models, you can use with to resize textures, often supporting a max size parameter (e.g., to 2048) during the conversion process.

Key Considerations:

• Lossy Format: KTX2 with Basis Universal is lossy, so repeated decompressing/re-compressing can reduce image quality.
• Performance: Resizing improves runtime performance by reducing GPU memory consumption.
• Mipmaps: Ensure tools generate new mipmaps for the resized texture.

Thanks, HiFlyer, gotta check them. At least one of them should be able to do batch conversions.

2 hours ago, MadDog said:

Does this method work in MSFS2024?  I think I read elsewhere that it only works for MSFS2020 (hoping I read wrong).

it does, BUT... you need redo the layout.json when compressing scenery images that are the in ms2020 format. 

using this tool   https://github.com/HughesMDflyer4/MSFSLayoutGenerator

 

7 hours ago, fluffyflops said:

it does, BUT... you need redo the layout.json when compressing scenery images that are the in ms2020 format. 

Awesome.  Thanks!