heat distortion problems

hello I am making a gunship which uses jet engines. I want to do a heat distortion effect and I followed this.

My problem is that the bluring effects the entire scene I have the blue flame and everything, I haved used a mix node and the alphaover node to combine the layers and yet, it still doesn’t work. Here is my setup.

Do I need an image as my backround?


Maybe you didn’t set up your render layers properly? Could you attach a .blend file?


ISSUE 9: Space

  • Articles/Tutorials on Creating Heatwave Exhaust Effect with the Displace Modifier

The file is to big, 4.4MB here is the latest render

I couldn’t find the alpha key. Is there a quicker way?