You need Photoshop, Indesign or Corel. You can download photoshop on a trial basis.
What you need to do is open your drawing or pic and selct transparency or the lens option. You can open a second pic and do the same and copy/paste it on top of the first and resize it, move it around etc... if you feel like it.
By clicking on each pic, you can apply separate transparency effect and incorporate 2 or 3 or even 4 pics with different effects and all will blend into one.
You can also apply the feather option if you want the edges to blend better.
What you need to do is open your drawing or pic and selct transparency or the lens option. You can open a second pic and do the same and copy/paste it on top of the first and resize it, move it around etc... if you feel like it.
By clicking on each pic, you can apply separate transparency effect and incorporate 2 or 3 or even 4 pics with different effects and all will blend into one.
You can also apply the feather option if you want the edges to blend better.