[PD] grain generator for gem

Sara Kolster sara at x-i.net
Thu Jan 20 12:39:52 CET 2005

>> At 15:37 19.01.2005, chris clepper wrote:
>> >pix_aging will put some 'noise' and scratches over your video.
>> well yes. allready looked up pix_aging. but somehow i wasn`t really happy 
>> with its results.
>> what i am looking for is not dust and scratches but filmgrain. the grain 
>> pix_aging produces
>> is not really fine structured. but anyway. i think i will try around a 
>> little more.

Also I found the pix_aging quite 'rough'. As Wolfgang writes, the filmgrain
looks too much like pixel-blobs. Where I was looking for is more fine
scratches, but the scratches in pix_aging are far to big, they are more like
thick lines over the picture. Is there a way within pd to adjust the structure
a bit? Or, is there a way in Gem you could draw 'scratches' [more like etching]
on a picture?

>> >   The particle system is somewhat analogous to granular synthesis for 3D.
>> well the particle system would be a good thing. but there is the problem 
>> with openGl. a
>> 3dimensional particle system (well maybe not in commercial 3d applications)
>> tend to
>> be more like little lines then concrete pixels. what i am looking for is 
>> something like
>> a 2d particle system which can be textured on geos. i think that could 
>> bring nice results
>> in grain generation.

I agree. I was playing around with the particle system as well; but didn't quite
get it to do what I wanted. But a 2D system could be interesting.


>> thanks for tips
>> regards
>> wolfgang
>> >Are either of those close to what you have in mind?
>> >
>> >cgc
>> >
>> >On Jan 19, 2005, at 6:19 AM, wolfgang schwarzenbrunner wrote:
>> >
>> >>hi
>> >>
>> >>i am recently looking for a nice way to create quite fine structured 
>> >>graphical noise in gem.
>> >>it should be controllable in speed as well as in grain size. well in 
>> >>general it should really be
>> >>a noise generater. more something like a film grain generator.
>> >>
>> >>anyone ever succeeded in building such a thing? i would be happy for any 
>> >>hints.
>> >>maybe a grain object would be something for to do lists.
>> >>
>> >>regards
>> >>wolfgang
>> >>
>> >>
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