How to Make Things Blurry Using GIMP. The free GIMP image editing application enables you to digitally add effects such as blurring to photos and images that were sharp when taken.

Add several splatters in an uneven circle around the bright flares. Now go to Filters>Blur>Gaussian Blur and change the values to 15. We now have a realistic looking explosion!

How to Remove Pixelation With GIMP. If you have digital images with pixelation or noise in them, you can improve them using the GIMP (GNU Image Manipulation Program) software. The GIMP filters ...

Fortunately, with GIMP 3, there'll be auto-expanding layers, which means GIMP will automatically adjust layer dimensions according to the latest changes.