Discrepancy with pages' format

[Arekkusu1998]

I've a bit of a weird question.
The webtoon pages are downloaded with a certain size: in the case of the one I did the first test with, 720 px).
Yet, I found the same pages of the same manhwa uploaded by an anonymous uploader on another web platform with a width of 1080 px and even 1242 px. I took another manhwa, and I noticed the same discrepancy: the pages are available at 720 px wide on Lezhin, at 1280 px on another web platform. And the sharpness isn't affected, quite the opposite!
I suspected that WEBP format was the culprit, but even adding the -j or -jpg argument (as wrote in #42) the output format doesn't change.
How can I download the original (not shrunken) pages' size?
Is there some trick and/or argument to obtain HD format?
Thank You.

[ImSejin]

Could you tell me all arguments you tested with?

[Arekkusu1998]

Thanks for Your kind reply.
Since I've no programming knowledge, I followed Your instructions and some screen examples I saw into «issues» section (where I'm understand them a bit).
My tests were:
java -jar lezhin-comics-downloader.jar -l=en -n=cloud_en -r=~2
java -jar lezhin-comics-downloader.jar -l=en -n=cloud_en -r=~2 -j
java -jar lezhin-comics-downloader.jar -l=en -n=perfecthalf -r=~2
java -jar lezhin-comics-downloader.jar -l=en -n=perfecthalf -r=~2 -j
I've not used any arguments other than those You see.

[ImSejin]

LezhinComics serves images whose width is 720px on free episode by default,
but if you buy paid episodes, it serves images with higher quality than default — maybe 1080px or more.

Without payment, no trick or argument to obtain higher quality. (refer to #13)

[Arekkusu1998]

Ohhh, now I understand, thank You.
I hadn't read #13 'cause I don't know Korean language. So, when I'll purchasing the Lezhin "Coins", will I be able to download both free and unlocked chapters at full resolution (1080px or more)?

[ImSejin]

when I'll purchasing the Lezhin "Coins", will I be able to download both free and unlocked chapters at full resolution (1080px or more)?

I'm not sure that.
Downloader gets the same images as the width of images you see on the chapter site and
they are provided with 720px of width (paid chapter provides higher resolution).

There is not other way to obtain higher resolution as far as I know.

[Arekkusu1998]

This deepens the mystery as to how it's possible that on other platforms -which are not even paid- the chapter pages that Lezhin offers at 720px with greater widths (1080px or even 1240px) are available. After all, Lezhin wants money, so it should guarantee the highest quality to every customer: it's not a honest behaviour/policy towards us!
I suppose I'll write this complaint to the two manhwas' authors.

[ImSejin]

I hope it goes well.
Can I close this issue?

[Arekkusu1998]

Alas yes, this issue can be closed, although the mystery about the source of that large-sized pages on other platforms hasn't been solved😢; but it seems that nothing can be done.
Thank You.