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Posted
17 hours ago, thecatpetter said:

I'm trying to make a photo with a heat warp effect

If you post an example of that sort of effect someone may have some ideas

To save time I am currently using an automated AI to reply to some posts on this forum. If any of "my" posts are wrong or appear to be total b*ll*cks they are the ones generated by the AI. If correct they were probably mine. I apologise for any mistakes made by my AI - I'm sure it will improve with time.

  • 3 weeks later...
Posted

My usual response for effects like this is to reach for the Equations filter. I had a quick experiment adding a sine wave to both the x and y axes.  The problem is that you need several parameters and the Equations filter only offers three. Anyway, here is a first try.

Go to the Equations filter, Filters > Distort > Equations. In the x= and y= sections enter:

x=x+5*c*sin(360*y/h)+5*b*cos(270*y/h)
y=y+5*a*sin(360*x/w)+5*b*cos(270*x/w)

The a, b and c are parameters that affect the amplitude of the fuzziness. You can use the a, b and c sliders to modify these. The 5 is a hard-wired additional scaling factor for the amplitude.

The 360 and 270 are hard-wired factors which affect the wavelength of the fuzziness. Here are a pair of images. The first is the original, the second has the fuzziness applied.

AmaryllisMergeAWR50pc.jpg.2b7cc817b51b2b575216585164beb501.jpg  AmaryllisMergeAWRFuzzed50pc.jpg.7d7a4343ccf86928e1acc9998c1ed881.jpg

Is this on the right lines for creating the desired heat haze or hammered glass effect? I can continue with this and create a macro if you think it useful.

John

 

Windows 11, Affinity Photo 2.4.2 Designer 2.4.2 and Publisher 2.4.2 (mainly Photo).

CPU: Intel Core i5 8500 @ 3.00GHz. RAM: 32.0GB  DDR4 @ 1063MHz, Graphics: 2047MB NVIDIA GeForce GTX 1050

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