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a8isa1's Photo


Member Since 15 Apr 2006
ONLINE Last Active Today, 10:11 AM

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In Topic: Images generated by RastaConverter

Today, 10:00 AM

Grew tired waiting for this picture to get better. 


Moving on to the next one(s)...

Attached File  maine_coast_screenshot.png   11.78KB   3 downloads

Attached File  a8isa1_maine_coast.xex   21.98KB   1 downloads

Attached File  a8isa1_maine_coast_PAL.xex   22.05KB   2 downloads


In Topic: Images generated by RastaConverter

Wed Nov 22, 2017 8:52 AM

Sure...I'm not sure what the command line is for though, is that for RastaConverter command line? I use the GUI front, so I don't use commands. 


Edit: Looks good on my setup! The colors all look good, bright red car. looks even better in real life than the screen shot here. The greens are more olive colored than in the emulator. There's a bit of red banding in the trees that doesn't show up on your screen shot. Of course I have been playing with my 1200XL's color pot recently and may not have reset it perfectly. 

Ugh! Banding is always a concern but the red at the edge of the shadow of the Chevy is more of an issue.  That's false color.  I didn't see it in the emulator.  Using the regular palettes.


Command was just the invocation of the emulator, Atari800, from which I get screens.  Users need my palette to get the same saturated colors in my image (if not using real hardware).



Give my palette a try for Rastaconverter.  My palette has lowered contrast. I find I always need at least " /contrast=15".  If you use "/S=1" you will get usuable test renderings almost immediately (well, in a couple of minutes).   If you get bright pink pixels where they don't belong then /dither_val is too strong.  If you get charcoal gray pixels prominent in dithers (where gray doesn't belong) try combinations of lower gamma and higher contrast.  This tip seems to work best with 'chess' and 'line' dithers.  Less so with 'jarvis'.  Not at all with 'knoll'

In Topic: Images generated by RastaConverter

Tue Nov 21, 2017 7:14 PM

Gunstar, if you don't mind would you please give this PAL picture a try on real hardware?


It's still a WIP but it's close to done (I hope).


Attached File  cuba_56chevy_atari800_screenshot.png   32.48KB   6 downloads



Attached File  cuba_56chevy_PAL.xex   22.13KB   17 downloads



Attached File  pal_241_15start_30sat.zip   935bytes   6 downloads


Typical command

atari800 -windowed -pal -palettep pal_241_15start_30sat.pal -run cuba_56chevy_PAL.xex

In Topic: Images generated by RastaConverter

Sun Nov 19, 2017 7:57 PM

I've tried them, and things look off, but very colorful, but then they are NTSC correct? I didn't expect them to look right on my PAL.

There's an ATR with PAL pictures using a palette I hoped would work for PAL.   Stephen's description seems to prove my idea was wrong.


NTSC palette was off for me but ever so slightly.  I am encouraged that the saturated colors seem to translate to real machines.

In Topic: Images generated by RastaConverter

Sun Nov 19, 2017 7:34 PM

If you want to have a crack at it, here's what I used as input.   I thought I'd resized it to a suitable size but apparently not.


I would try but pictures with clear blue skies give me fits