Compileable version of Alien Breed 3D II - The Killing Grounds

[abu_the_monkey]

Originally Posted by Dunny

That is precisely my problem also. It's just too dark and I have to crank the brightness up or you can't see anything in the long corridor to the bridge. As I said before, Breathless doesn't seem to suffer from this problem.

There has to be something that the Pi's videocore driver doesn't like.

FWIW I don't get any image degradation beyond the palette being too dark - pixels are crisp and evenly sized.

are you also using a TV via HDMI as a display?

[Dunny]

Originally Posted by abu_the_monkey

are you also using a TV via HDMI as a display?

Yes indeed. Also happens with a PC monitor too, mind.

[abu_the_monkey]

the plot thickens.

@pipper
do you see any noticeable difference between you A3000 RTG output and what you see in Winuae?

[abu_the_monkey]

Originally Posted by Dunny

Yes indeed. Also happens with a PC monitor too, mind.

I may have to take the plunge and get a PiStorm.

if I don't post anything in the next week or so the wife found out and I am pushing up daisies

[Dunny]

Originally Posted by abu_the_monkey

I may have to take the plunge and get a PiStorm.

if I don't post anything in the next week or so the wife found out and I am pushing up daisies

Well, if you wait for a while I'll have a Framethrower and that will pipe the RGB signal directly from the video chip and sends it to the Pi's camera port where videocore mixes it into the display.

It's highly possible that the RGB to VGA, then to OSSC, then to HDMI is causing this palette difference, and the Framethrower eliminates all that.

Of course, the PiStorm is bloody great fun in any case, so get I'd recommend getting one anyway

[abu_the_monkey]

Originally Posted by Dunny

Well, if you wait for a while I'll have a Framethrower and that will pipe the RGB signal directly from the video chip and sends it to the Pi's camera port where videocore mixes it into the display.

It's highly possible that the RGB to VGA, then to OSSC, then to HDMI is causing this palette difference, and the Framethrower eliminates all that.

Of course, the PiStorm is bloody great fun in any case, so get I'd recommend getting one anyway

wow that's a lot of signal conversions going on there.

I will hold fire on pushing the 'purchase now' button for now then.

[abu_the_monkey]

@Dunny

please excuse my ignorance, but, what is the framethrower you mention?

[Dunny]

Originally Posted by abu_the_monkey

@Dunny

please excuse my ignorance, but, what is the framethrower you mention?

Was previously called the "mipidipidoo" - it attaches to Lisa and sends the RGB pixel data over to the PiStorm's camera port. Videocore picks up the signal and mixes it with the RTG display (or replaces it in fullscreen mode). It's almost ready for production.

It basically means that the PiStorm handles all of the Amiga's video out through its HDMI socket instead of the two-sources thing we have going on right now.

Anyway - here's AB3D2 AGA:



And RTG:



On my PC monitor rather than my TV.

[pipper]

Is it correct to state that the border around the image is a blacker black on RTG than on AGA?

[abu_the_monkey]

Originally Posted by pipper

Is it correct to state that the border around the image is a blacker black on RTG than on AGA?

yes it would appear so. RTG is black, AGA is grey.

[abu_the_monkey]

the lighter areas are 'whiter' also in RTG?

[Karlos]

Originally Posted by abu_the_monkey

the white areas are 'whiter' also in RTG?

Daz mode? Apologies for being less than helpful lately, it's the last ten days of Ramadan and I'm beat.

[abu_the_monkey]

Originally Posted by Karlos

Daz mode? Apologies for being less than helpful lately, it's the last ten days of Ramadan and I'm beat.

You sir are always helpful.

[Karlos]

Originally Posted by pipper

In addition to what Abu says, it could be related to a difference in output levels between the Amiga's RGB connector and the VGA/HDMI signal from RTG.

Play with the "Black Level" Setting for the various inputs of your TV. Color space should be "sRGB" .

https://en.wikipedia.org/wiki/Black_level

In the current engine build, numeric pad 1/2/3 adjust the black point of the palette. Obviously this results in a loss of dynamic range at the bright end, which can be partially compensated by reducing the contrast (keys 4/5/6).

Obviously, doing this by manipulating the palette entries is no free lunch. You are going to lose something, somewhere when you adjust these.

[Angus]

@Dunny
I don't suppose there's a way to combine the audio so that it's output in the hdmi?

[abu_the_monkey]

Originally Posted by Angus

@Dunny
I don't suppose there's a way to combine the audio so that it's output in the hdmi?

my guess is that you would have to force this option in the config.txt of the Pi

there seems to be a plethora of options and I would not have a clue where to start

over to you @Dunny

[Karlos]

I suspect any audio capture will only ever be analogue (since Paula does it all internally), and I'm not sure what ADC options exist in the hardware as it stands to get it into whatever (presumably digital) format that HDMI expects.

[abu_the_monkey]

Originally Posted by Karlos

I suspect any audio capture will only ever be analogue (since Paula does it all internally), and I'm not sure what ADC options exist in the hardware as it stands to get it into whatever (presumably digital) format that HDMI expects.

oh yeah. Doh!

[Havie]

I should have said that my Amiga connects via rgb SCART for native Amiga modes and HDMI for V1200 RTG.

I do have an external capture box (Amiga modes via composite though and HDMI) so will have a go at hooking this up. Just bit more of a fuss as it records to a USB stick and then obviously need to go through the PC to upload.

But might help with AGA v RTG debate.

I prefer to use AGA if I can, as I am a bit of a purest, and just think of the V1200 as an accelerator but in this instance there is quite a difference in speed.

[Angus]

Originally Posted by Havie

I should have said that my Amiga connects via rgb SCART for native Amiga modes and HDMI for V1200 RTG.

I do have an external capture box (Amiga modes via composite though and HDMI) so will have a go at hooking this up. Just bit more of a fuss as it records to a USB stick and then obviously need to go through the PC to upload.

But might help with AGA v RTG debate.

Look forward to hearing your findings.

I have a similar situation, but I take the Amiga RGB to a SCART splitter via a female to female connector and then ones goes to the TV, ones goes to the SCART to HDMI converter/USB recorder. It works quite well, but I had to fiddle a bit with the TV to stop it backwashing ghosted images downstream.