Create a powerful sun effect inside After Effects without 3rd Party Plug-ins.
Heat Distortion Plug-in from Video Copilot : https://www.videocopilot.net/products/heatdistortion/
Look At Expression:
value+lookAt(thisComp.activeCamera.toWorld([0,0,0]),position)[0]
value+lookAt(thisComp.activeCamera.toWorld([0,0,0]),position)[1]
value+lookAt(thisComp.activeCamera.toWorld([0,0,0]),position)[2]