Split image render effciency

I did a search for "scanline" in existing filters. There are quite a few, maybe some of them use a method that is close to what you are looking for.

I noticed that the rendering option "Anti-alias sources for bitmap-based components" has a huge impact on the rendering time for certain filters. In particular Wavy Neon Lines, it goes from 10 seconds when off to 90 seconds when on for the default preset.

Thanks for that, I have a look at the wiki. I have a lot to learn, but having an active forum as this seems to be will help a lot.

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xirja wrote: Maybe Free Rectangle

Here ia simple version with one strip that can be adjusted manually...
This is for FF6...

Simple Thing.ffxml

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CFandM wrote: Are you doing this for one image or is this for a part of a bigger filter

It was more of a general question. It's a function that is useful for so many filters and I've needed it several times recently.

I've seen several filters using a gradient and I think that is the most common method. A free gradient is listed as ultra-fast in the wiki but you have to run the output through a threshold component to get a sharp edge and that may slow it down.

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xirja wrote: Lookup would be my guess. Maybe Free Rectangle to Threshold.

Thank you. I have to look up the Lookup component, I'm not familar with it. I was actually trying to use a frame, scaled, squashed and with y offset the same way as you suggest we use the free rectangle. I suppose the rectangle is the better option.