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How to Create That Shimmer Caused by Heat - in Render and/or Postwork

CathyMCathyM Posts: 261
edited December 1969 in The Commons

I've been trying to figure out a way to create that hazy look that appears above surfaces - the ground, the road, etc. when it is very hot - that makes the air appear blurred or out of focus - anyone have any luck at creating that effect or advice as to how to achieve it? Thanks! -Cathy

Comments

  • SickleYieldSickleYield Posts: 7,634
    edited December 1969

    With postwork blur, the fastest thing for me has been:

    Duplicate the layer in your image editor.

    Set the opacity of the layer above lower (how low must be experimented with for each image). Mask out everything but the area you want to have the shimmer if you don't like the effect on contrast and saturation.

    Use a smudge tool to distort the shimmer area on the top render (probably in slightly squiggly lines for heat shimmer), then run some blurs over it after that.

    In the GIMP when I've done it this results in a nice blur effect applied to just that part of the render.

  • jorge dorlandojorge dorlando Posts: 1,157
    edited December 1969

    Suddenly, you can try this:

    4.jpg
    1920 x 1080 - 318K
    3.jpg
    1920 x 1080 - 343K
    filhaemvue.jpg
    1920 x 1080 - 93K
  • jorge dorlandojorge dorlando Posts: 1,157
    edited December 1969

    Or...

    6.jpg
    1920 x 1080 - 286K
    5.jpg
    1920 x 1080 - 297K
  • patience55patience55 Posts: 7,006
    edited December 1969

    It's been my observation that heat waves can actually produce a wavy distortion, not necessarily a straight line blur.

  • KeryaKerya Posts: 10,943
    edited December 1969

    http://www.cornucopia3d.com/forum/viewtopic.php?t=3948&sid=95f5fff028b356e1d45a3c5f6a48a662

  • CathyMCathyM Posts: 261
    edited December 1969

    Thanks everyone for your answers :) Sickleyield thanks for the instructions - I was thinking this was something that would need to be postworked, was uncertain as to how to approach it - as Patience said, it seems to be a wavy, moving sort of blur - I think maybe the 2nd picture posted by jorge dorlando is sort of what I was looking for - a pixelated, non solid effect except I want it to be more see-through and on the ground area... Thanks for the link Kerya! I think between these ideas I have a great starting place - I am not too well-versed in postwork, so this should be an adventure :) -Cathy

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