texture.write("foo.jpg", true): extremely low quality in SU 2024 and 2025, was fine in SU 2017 and 2022

[arigo]

Calling the method texture.write("foo.jpg", true) writes foo.jpg in what used to be a reasonable quality, up to SU 2022. But starting from SU 2023 or 2024, the quality of the JPEG file is extremely low. To get the same low quality in GIMP I have to save the image with the quality slider all the way down to 4%. Needless to say, the image is rather useless.

I have worked around the issue by always writing PNG files instead on modern versions of SketchUp. On old versions (pre-2022) I still write JPEGs because writing PNGs used to be terribly slow, but that was fixed somewhere between 2017 and 2022. This bug report is only about the low quality of JPEG files, which continues to be the case in SU 2025.

[arigo]

Note: texture.write("foo.jpg", false) gives a good quality result. The problem is only with the colorize argument set to true.