pouët.net

Although I don’t have any technical background on Amiga I’m following the »current column-competition«™ with great interest. ;o)

Are these all prods involved or are there more?

Grade My Waterbear by Scoopex (2016-02-21)
Water My Grey Beard by Loonies & Struts (2023-01-22)
Joker Snacks On Blueberries by Batman Group (2024-12-14)
3D Demo 3: The Last Drop by Lemon. (2025-04-21)
Twelve Jokers In A Deck by Loonies & The Twitch Elite (2025-06-29)
...And One Up The Sleeve by Lemon. (2025-07-18)
Still Snacking by Batman Group & Capsule (2025-07-24)

Good compilation, I think that's all of them. It would also be interesting to indicate the columns and the technique used:

(2016-02-21) Grade My Waterbear by Scoopex (50 columns) -> Tech: copper
(2023-01-22) Water My Grey Beard by Loonies & Struts (54 columns) -> Tech: copper
(2024-12-14) Joker Snacks On Blueberries by Batman Group (59 columns) -> Tech: copper
(2025-04-21) 3D Demo 3: The Last Drop by Lemon (57 columns) -> Tech: copper + ham ?
(2025-06-29) Twelve Jokers In A Deck by Loonies & The Twitch Elite (64 columns) -> Tech: copper + raster
(2025-07-18) ...And One Up The Sleeve by Lemon (80 columns) -> Tech: copper + raster + ham
(2025-07-24) Still Snacking by Batman Group & Capsule (85 columns) -> Tech: copper + raster

(2025-7-26) The Joker Is A Knobhead by Django The Bastard (80 columns, Atari ST) -> Tech: hardsynced raster

(2021-xx-xx) Jeroen aka roondar / powerprograms (52 columns) -> Tech: copper

(2025-08-29) Fan Service / Vanity (88 columns * 61 blocs, Amstrad CPC) => Tech: z80 on fire + CRTC line duplication.

If i have well understood coopers,
Visually the amstrad cpc version looks like the Amiga one. However there is nothing to compare I guess: the closest cpc implementation would use split rasters, eventually on various pens (i'm not aware of demos doing that).

My question is: is Amiga able to do such wide rotozoomer by displaying individual pixels? (Eventually by duplicating lines has done on amstrad)

There are many ways to do rotozoom on Amiga, the column challenge is limited to 4x4 chunky pixels in 4096 colors because that's where getting more columns is the most fun. But that's not the most efficient way to do rotozoom on Amiga. You can use HAM mode to do it in 4096 colors with no limitation on the number of columns/rows (adding an "antialiasing" effect that you may or may not like) or an 8x1 copperchunky on color 0 to get the highest number of chunky pixels. You can also use bitplanes in 4, 8 or 16 colours to get other chunky pixel sizes such as 2x2, and even 1x1 based on scrolling with copper and blitter as the game "Brian the Lion" does in the menu logo.

On Amstrad, I think we can forget about true color, as it takes so many cycles to change one ink/color. Even with a fixed 16 palette and dithering pattern to get more "colors".

But it would be great to see how far/big can 50 fps rotozoom be on CPC 🤩

(2025-08-03) Stuck in the Middle by Desire (73 columns) -> Tech: copper + raster ?
(2025-08-16) Game Under by Lemon (92 columns) -> Tech: copper + raster + ham

@p01 I think I made an almost fullscreen at 50hz, but it is fucking ugly with a lower resolution https://www.pouet.net/prod.php?which=57201

(2025-08-02) Extended Knobhead by DHS (100 columns, Atari STe) -> Tech: Hardsynced rasters with CPU and Blitter, overscan

We forgot the first response to Photon:

(2016-05-24) Grizzlybear by Damones (32 columns x 256 rows = 8192 blocks) -> Tech: copper

It does not aim to compete for the columns record, but perhaps it is the record for the absolute number of blocks?

I wonder on CPC+ what's possible. You can change palette by writing in memory instead of OUT but cycles might still be too much.