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Old Yesterday, 17:57   #101
Akira
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WHO uses RF in this day and age? :P

The scanlines test thinking the colors blend would have worked, if the Amiga's display was interlaced, but it's progressive.. They would never blend.
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Old Yesterday, 18:27   #102
Gorf
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WHO uses RF in this day and age? :P

The scanlines test thinking the colors blend would have worked, if the Amiga's display was interlaced, but it's progressive.. They would never blend.
no, the PAL delay line in a TV set only stores the last transmitted line. So it is always the previous line in the field and not the previous in the frame!
Amiga, in non-laced mode now, is sending both PAL-fields without offset on top of each other (50 times per sec).

So a TV-set with a delay line should now mix the color information of the previous line with the new line and give us some blending.

Last edited by Gorf; Yesterday at 18:32.
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Old Yesterday, 18:50   #103
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Hmm so it depends on the TV set?
What kind of set would do this? I never seen it happening.
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Old Yesterday, 19:38   #104
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Hmm so it depends on the TV set?
What kind of set would do this? I never seen it happening.
The older the better.

If you look closer at Steril's CRT picture, we can see it already there ... (I don't know how his old thing handles composite):

Look at the "Balls" at the bottom and the colours around the white in the center of each ball. There should be stripes of white and the next brighter color, but instead we see a new color.

So why do we still see stripes at other places in the picture?
Probably because they are very different in brightness and only the colour-part ist going to mix.

So a equally bright blue and yellow stripes will give us a green area of the same brightness.
But a dark blue stripes and bright yellow stripes will result in a somewhat geenish pattern of dark and bright stripes..


An other trick of producing a new colour is changing the same pixels between two colors in every field. As long as the brightness is roughly the same, the human eye will see no flickering but a new color. This "temporal dithering" works also better on CRTs, because of the afterglow and the overall not so stable picture..

There was little use for this feature on Amiga, because you can change the colour midline with copper. But is was used on the C64, were the fixed colour palette was far more limiting.

Last edited by Gorf; Yesterday at 19:55.
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