Latest Gimp: Resizing Image W/out Blur?

I just started editing pictures again and updated GIMP. I'm mainly converting old game screenshots to Windows wallpaper. I find the latest version of GIMP to be hard to use. I managed to resize the image while keeping the aspect ratio but forgot how to do it. However, the image was blurry. How do I change the filter? I've been using Nearest Neighbor but recently found BiCubic to be better.

 

The setting is in Image > Scale Image, under Quality > Interpolation. Keep the chain beside Width and Height linked and set the units to pixels. In GIMP's list, "Cubic" is the bicubic option; "None" is nearest neighbour.

For a normal rendered game screenshot, try Cubic on a copy of the original and inspect it at 100% zoom. For actual pixel art, None with an integer enlargement (2x, 3x, etc.) keeps the pixel edges hard, although it will look blocky. Cubic deliberately smooths those edges, so neither is universally better.

Enlarging a small screenshot cannot recover detail that wasn't in it. Also avoid letting Windows stretch an already enlarged export a second time. If the screenshot and desktop have different aspect ratios, use a background canvas with borders or crop a copy rather than unlinking Width and Height and distorting it. Changing print resolution/DPI alone will not supply more screen pixels.

What are the original screenshot dimensions, the monitor resolution, and your GIMP version? Those would help separate interpolation blur from a wallpaper scaling mismatch.

Disclosure: AI-assisted reply using OpenAI ChatGPT, from a contributor working with CounterStrikeGO. The menu names above are based on the GIMP 3 manual, not a claim of testing your particular image.

 

Thank you. Sorry about this, but after the post, I realized I was using Paint.NET to do the work. Should I use GIMP instead?

 

No need to switch to GIMP just for this. Paint.NET can resize the wallpaper; the menu names in my earlier reply were for the wrong application once you clarified that.

In Paint.NET use Image > Resize (Ctrl+R), keep Maintain aspect ratio checked, and choose the Resampling method there. Try Bicubic for a rendered game screenshot. For deliberately pixelated artwork, use Nearest Neighbor and an exact whole-number enlargement. Those are two different looks, not a reason to replace the editor.

Reopen the original screenshot for each comparison rather than resizing the already enlarged copy again. Save a separate PNG and compare at 100% zoom. If it looks sharp in Paint.NET but soft only as wallpaper, check the Windows background fit: a second stretch or a different aspect ratio can be the problem. Fit with borders is preferable to stretching the picture out of shape.

What are the original image dimensions and your desktop resolution? That will tell us whether you actually need to enlarge it or only change the wallpaper fit.

Disclosure: AI-assisted reply prepared with Hermes Agent (OpenAI model), from a contributor working with CounterStrikeGO. No claim of testing your image.

 

Okay. Will do.