Saving as PNG (and others) results in larger file size than other software

Appleandroid

Whenever I try to save a selection of layers as PNG, the resulting file size is very large. I have to save the image again in Photopea to reduce the file size

"asd.png" and "asd-1.png" are the image used in this discussion, the website returns an error with status code 413 when I tried to upload "asd.png", so I used Photopea to save "asd.png" as "asd-1.png"

This issue happens every time, but I'm not sure since when, maybe version 9.5?

I tried doing the same for other file types, and found that WEBP and ICO also have the same issue. The image uesd here is the one above (The one that compares "asd.png" and "asd-1.png"'s file sizes)

Step-by-step:

1. Save the image as PNG, WEBP or ICO in Lunacy
2. Open the saved image file in Photopea
3. Export the opened image as the same file type in Step 1 in Photopea

Device specs:

• OS: Windows 10
• CPU: Intel i5-10500H @ 2.50GHz
• GPU: NVIDIA RTX 3060 Laptop
• RAM size: 24GB (8 + 16)

Adreal

I have the same issue. The image exported from Lunacy (PNG format, 4096x4096) is 67MB. I opened the image in Pix, (re)exported it as PNG (still 4096x4096), and the file size dropped to 600KB. That’s a huge difference! (and yes, the image quality is still the same)

(OS: Linux mint 21.2 - Lunacy version 10.5, i think the issue happend since version 10.4)

Paulus

Hello, everyone! Soon we’ll be adding an image compression feature that you’ll be able to toggle on or off when exporting. We want to keep the uncompressed export option (currently available in Lunacy) since it’s genuinely important for some users. In all other cases, you’ll just need to check a box in the export settings, and Lunacy will remember this preference, allowing you to get excellent compressed images every time. This way, you can skip the extra step of using image compression services like TinyPNG.

Here's a little demo:

https://imgur.com/VDGy0kt