POV-Ray : Newsgroups : povray.unofficial.patches : for Anthony Benett (email wouldn't go through) Server Time
2 Nov 2024 03:16:42 EDT (-0400)
  for Anthony Benett (email wouldn't go through) (Message 1 to 2 of 2)  
From: Nathan Kopp
Subject: for Anthony Benett (email wouldn't go through)
Date: 7 Feb 2000 11:37:09
Message: <389ef4b5@news.povray.org>
> Here's my idea for a brother to the 'soft_glow' effect. Using a darken
> filter, with less gaussian (3 or 4 seem to be good values), you can get
> images like the ones I'm sending you. I don't know if this filter would be
> useful, but it looks interesting. It reminds me of this transluscent paper
> Mom used to draw on. She would make bookmarks and stuff like that.

>From the MegaPov docs:

"Negative values for amount cause a the result of the gaussian blur to be
combined with the original using 'darken' instead of 'lighten'.  Values less
than -1.0 will have very little (if any) effect on the image."

The filter does allow you to control the gaussian radius (although the
radius should be double the value used in PSP in order to get similar
results... I'm not sure why).

-Nathan


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From: TonyB-FSU
Subject: Re: for Anthony Benett (email wouldn't go through)
Date: 7 Feb 2000 15:41:57
Message: <389f2e15@news.povray.org>
> "Negative values for amount cause a the result of the gaussian blur to be
> combined with the original using 'darken' instead of 'lighten'.  Values
less
> than -1.0 will have very little (if any) effect on the image."

I discovered this when Bob posted his images. It had never occured to me to
use negative values.

> The filter does allow you to control the gaussian radius (although the
> radius should be double the value used in PSP in order to get similar
> results... I'm not sure why).

I use Photoshop and I experienced this difference as well. You need to cut
the values in half in Photoshop to get it too work the same.

Anyway, thanks for your response. Keep working on the cartoon filter. I'd
really like that. :)


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