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Quondam Tunneling

This was my contribution to the tunnel compo at Fjälldata 2026: A full-screen 3D tunnel on the Commodore 64.

Also check out this video, where I explain how the effect works.

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Posted Saturday 31-Jan-2026 23:49

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Anonymous
Sun 1-Feb-2026 10:01
Hello Linus,

You're still a genius with this one. Repeating the same screen row, switching just the charsets(banks) and color registers to create the illusion of panning thru the tunnel with sprite masking in the middle.

Good job,
BiGFooT
Anonymous
Sun 1-Feb-2026 15:52
It is fantastic and very creative. Congratulations, you are great!
Anonymous
Mon 23-Mar-2026 14:27
Reminds me very much of the tunnel levels in Stardust (and Super Stardust) on the Amiga by Housemarque!
Anonymous
Thu 26-Mar-2026 21:16
Hi - I tried running this on a mostly stock c64c and kung fu flash, it's not working. Do I need something that allows for self-modifying code? THanks!
lft
Linus Åkesson
Fri 27-Mar-2026 06:10
Hi - I tried running this on a mostly stock c64c and kung fu flash, it's not working. Do I need something that allows for self-modifying code? THanks!

Hi! The demo requires PAL timing. Are you by any chance using an NTSC machine? Otherwise there are no particular requirements.