Three.js: EXRLoader Limited map size

[threethreenine]

Description of the problem

I baked the scene in Unity and showed it in three.js, and loaded the lightmap in .exr format in three.js. As a result, the exr map of 512 * 512 pixels and below were displayed normally, and the map of 1024 * 1024 pixels and above were displayed normally. Display with red, green and blue noise. for example:

1 exr maps baked by Unity to use as a lightmap，size 1024*1024

1 exr maps baked by Unity to use as a lightmap for the model, size 1024*1024

4 exr maps baked by Unity to use as a lightmap for the model, size 512*512

Three.js version

• [ ] Dev
• [x] r113
• [ ] ...

Browser

• [x ] Chrome

OS

• [x ] Windows

Hardware Requirements (graphics card, VR Device, ...)

NVIDIA GeForce GTX 1060 5GB;
Intel(R) Core(TM) i5-8500 CPU @ 3.00GHz

[sciecode]

@threethreenine Thank you for letting us know about the problem.

Is it possible to share the .exr file in question?
Also, report the values inside textureData.header, please.

new EXRLoader()
    .load( 'textures/file.exr', function ( texture, textureData ) {

    console.log( textureData.header )

    } );

[threethreenine]

@sciecode If possible, please give me an email address and I will send the documents to this email.
I screenshot the value oftextureData.headeras follows

[sciecode]

Nothing stands out in the header info, so I'm guessing this is yet another bug with PIZ compression.

[threethreenine]

@sciecode I have shared files on Google Cloud, here is the link https://drive.google.com/file/d/12yK5C-4k2a7Ah9v1C-xciaCZFzdhTDNN

[sciecode]

Yes, the issue is indeed related with the compression algorithm used internally.

It might take a while to debug exactly the cause, but I've saved the file using a different compression that works correctly. You might want to use that while I try to find the cause of the problem.

baked_lightmap.zip

If unity allows control over the internal compression for the .exr file, prefer using ZIP or DWA in the meanwhile.

[threethreenine]

@sciecode Thanks for your help and suggestions. I will try to replace the compression method of .exr files in Unity.
Or save the .exr file generated in Unity again using image processing software similar to Photoshop, I think you should use Photoshop to help me change its compression method.

[sciecode]

Just filed a PR to solve this issue, would appreciate if you could test it @threethreenine.

[threethreenine]

@sciecode I have tested it, the effect is normal;