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Author Topic: Composite/RCA/RF filters ?  (Read 778 times)

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Offline gameblabla

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Composite/RCA/RF filters ?
« on: March 05, 2017, 08:01:55 pm »
As you may know, video games over composite gets blurred a lot.
Of course, some video games took advantage of this to add new colors (look at some CGA DOS games over composite).

The problem is that i can't find a specific filter to mimic that effect, other than the blur function but it does not mimic
the rainbow effects associated with composite.

Any ideas how i can achieve this ?
I'm working on a Colecovision game and some of my images in-game are very grainy.
I'm curious to see how Composite output renders them.


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Offline p2

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Re: Composite/RCA/RF filters ?
« Reply #1 on: March 05, 2017, 08:30:27 pm »
spounds like a typically weird hardware thingy, so I doubt theres any way to really simulate this, other than just getting the same hardware... :/
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Offline gameblabla

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Re: Composite/RCA/RF filters ?
« Reply #2 on: March 05, 2017, 08:37:34 pm »
Well, i'm pretty sure it must exist because libretro has GLSL shaders that can mimic the gameboy's LCD screen and Kega Fusion also has a filter called "TV mode" that imitates composite output.
However, i can't find such a filter for GIMP or even Photoshop.
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Offline p2

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Re: Composite/RCA/RF filters ?
« Reply #3 on: March 05, 2017, 08:38:47 pm »
aah okey ^^
u might want to try alternative software like Paint.Net as well (a few thousand mods for it). Maybe u find something there :)
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Anyway war sucks. Just bring us your food instead of missiles  :P ~ DJ Omnimaga (11.10.2016 20:21:48)
if you cant get a jframe set up, draw stuff to it, and receive input, i can only imagine how horrible your game code is _._   ~ c4ooo (14.11.2016 22:44:07)
If they pull a Harambe on me tell my family I love them ~ u/Pwntear37d (AssangeWatch /r/)
make Walrii great again ~ DJ Omnimaga (28.11.2016 23:01:31)
God invented the pc, satan the smartphone I guess ~ p4nix (16.02.2017 22:51:49)

Offline gameblabla

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Re: Composite/RCA/RF filters ?
« Reply #4 on: March 05, 2017, 08:53:47 pm »
Sadly, Googling turned to nothing... :(
Maybe it's called something else
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Offline c4ooo

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Re: Composite/RCA/RF filters ?
« Reply #5 on: March 06, 2017, 01:48:27 am »
If anyone knows anything about GLSL shaders its @Snektron :)

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Re: Composite/RCA/RF filters ?
« Reply #6 on: March 06, 2017, 04:21:36 am »
I think some retro style games used such filter before, but the problem is that most games and emulators that did just use fake scanlines that don't move, so it looks so fake.
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