Exported PNG from Blur TOP shows dark edges on transparency

Hi, I am trying to export a PNG with transparency from the output of a Blur TOP.

Although the edges look cleanly blended in the TOP preview, they are dark, blackened on the exported image.

How can I export a PNG with clean edges? I’ve tried changing a number of settings in the involved OPs with no success, perhaps I’m missing something basic.



Exported PNG: TDMovieOut.0
PNG_transparency_test.toe (3.6 KB)

Hey @morekid,

it seems like saving the png premultiplies the color with the alpha. To counteract this, use a Math TOP before the Movie File Out and set the Operation parameter on the Multi-Add page to “Divide RGB by Alpha”.

Hope this helps

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Works perfectly Markus, thanks!