Hi BabylonJS forumers. Thank you for creating such an incredible platform and community!
I am having a challenges with exporting a glb and maintaining the original texture resolution.
My glb has a texture of 12288 x 12288. When I load to glb.babylonpress.org and exporta WebP version, the texture is always downsized to 5760.
Is there any way that I can control this and keep the maximum resolution?
I look forward to hearing from someone shortly. Many thanks!!
Hello and welcome!
glb.babylonpress.org is my creation 
Could you share your model to check what is happening?
Do you have the same problems if transform your model at https://gltf.report/ ?
Hi Labris - thank you very much for your kind reply. It’s happening with all my glbs that have a 12288x12288 texture.
When I export from gltf.report, though, it keeps the high resolution. However, the texture isn’t converting to WebP in gltf.report - it’s staying as a jpeg texture.
I will have a look, probably there is some browser limitation for conversion.
Meahwhile you may do the same transforms in Node.js environment wiith the help of GLTF-Transform CLI which doesn’t depend on browser, may use lossless codec and shouldn’t have such limitations.
Also, be aware that such big textures may lead to crash on non-high-end machines.
I wasn’t able to reproduce this issue with PNG texture 12188x8122 resolution at https://glb.babylonpress.org/ - after optimization I have the same width and height of WEBP texture. How do you export your GLB from there - is it the main export button at the bottom menu bar or Inspector export button?
But I was able to reproduce this issue when exporting from Sandbox with the help of Inspector. In this case the texture becomes 7055x4702.
@alexchuber , what do you think about it?
Here is my test file - Babylon.js Playground
To reproduce the Sandbox issue, open the Inspector
and export GLB.
Texture will lose some resolution when you check the exported file in the Sandbox.
I am away right now, so I can’t double check this, but it might be because we use the default quality level (something like 1/2? 127/255?) when re-encoding the image. Check the parameters of ‘DumpData()’ for more info.
Here is the small test plane mesh with 12188*12188 texture resolution - Babylon.js Sandbox - View glTF, glb, obj and babylon files
When exported from the Inspector, it reduces to 5760x5760.
Still, when exporting after conversion to WEBP at https://glb.babylonpress.org/, it has the same dimensions 12188x12188.
@Christopher_East Did you solve your issue or there are any other related questions?
Let me assign to @alexchuber if not urgent so she can have a look when she ll be back next Monday as it sounds like a potential bug. I can have a look if it is urgent.
I don’t think it is urgent since it exists at least from Babylon 5
Still it is strange behavior which a user shouldn’t experience with default settings.
