John Romero's SIGIL - Vanilla DOOM (DOS) Edition

[the_kovic]

Presenting SIGIL: Vanilla Edition - a modification of SIGIL that runs in Chocolate DOOM as well as the original DOOM.EXE!

 

Why?

The original release of SIGIL requires a limit-removing source port to run. I wanted to create a purely vanilla version mainly for two reasons: 1) To be able to run Episode 5 in the original DOOM.EXE for retro reasons and 2) To make SIGIL available for people who depend on vanilla compatibility, for example console ports of DOOM.

 

How?

I went through all the maps in chocorenderlimits as well as Chocolate Doom to make sure it adheres to all the limits. Most common limits breached were (unsurprisingly) the visplane limit and the drawseg limit. In my modification process, I put emphasis on keeping the gameplay as similar to the original as possible. This meant I avoided layout changes and prioritized removing detail from non-gameplay areas. Despite that, some changes were unavoidable - most notable is the Cyberdemon maze in E5M6 which is infamous for the notches on the walls that hinder movement. I tried to keep them as hard as I could but they had to be removed in the end because they just ate up all the drawsegs which caused half the room to disappear into the hall of mirrors.

 

Download link:

SIGILDOS.zip

 

Screenshots

Known issues

Going too far into the lava towards the edge of the map in E5M2 and E5M5 will cause a visplane overflow (caused by the cracks on the floor and ceiling but I decided to keep this detail because you should die from the lava before you manage to get here).

A few angles in some maps may still exhibit a hall of mirrors effect caused by drawseg overflow (should be hard to notice).

 

Credits:

John Romero (proof of permission to share this here:)

Edited February 25, 2022 by the_kovic
hotfix

[Gibbon]

Looks great!  Can't wait to see it in action.

 

a pozdravy z Česko taky :)

[Wavy]

Sigil's now under vanilla limits with no smoke and mirrors? Very impressed with this. Great job mate.

Edited February 24, 2022 by Wavy

[Hitboi]

Nice, somebody has the bones to make SIGIL vanilla! Good job on this.

[adamastor]

This is awesome.

 

Good stuff, kovic.

[Biodegradable]

Looks like Christmas came early this year for hardcore vanilla enthusiasts. Well done, Kovic! 

[Noiser]

I always wanted to see something like this. Great work!

[Big Ol Billy]

Awesome, also petition to call this version SIGILLA ;)

[amackert]

That is awesome. Going to have to fire this up on the 'ole Windows '95 PC. :)

[Redneckerz]

This is awesome! What a incredible technical achievement.

 

but @the_kovic  i have to be a debbie downer here:

 

How is this different from @xttl's SigExe? This was released on June 3, 2019:

 

Do note that in no way am i dragging your achievement down. I think this is very, very impressive. I just want to know, from where this differs from the 2019 executable :)

[xX_Lol6_Xx]

Holy cow. Awesome!

Downloaded inmediately

[Noiser]

24 minutes ago, Redneckerz said:

How is this different from @xttl's SigExe? This was released on June 3, 2019:

The xttl executable have extended limits (from Doom plus), while this version change the maps to comply with vanilla limits.

Edited February 24, 2022 by Noiser

[Redneckerz]

7 minutes ago, Noiser said:

The xttl executable have extended limits (from Doom plus), while this version change the maps to comply with vanilla limits.

If that's the case then i stand further corrected and then this is a monumental achievement getting it to work in Vanilla.

 

Cacoward mention, right here. And Romero-approved :)

[OpenRift]

So basically, this is SIGIL_SUPERCOMPAT.WAD, lol. Seems a bit superfluous to me given the existence of xttl's SIGEXE, but a very cool experiment nonetheless.

Edited February 24, 2022 by OpenRift

[esselfortium]

Nice work!

[Egg Boy]

Neato!

[uber]

5 hours ago, Big Ol Billy said:

Awesome, also petition to call this version SIGILLA ;)

[the_kovic]

1 hour ago, OpenRift said:

So basically, this is SIGIL_SUPERCOMPAT.WAD, lol.

 

Indeed. In fact, that was the original name but I had to shorten the name to comply with DOS's file length limit.

[DynamiteKaitorn]

I've managed to find several bugs on different maps:

 

E5M1:

Spoiler

Looking to the left will cause a VPO crash.

 

E5M2:

Spoiler

This is more of the player's fault since it's out the way of main gameplay but like 5M5, going too far out crashes with a VPO.

 

E5M4:

Spoiler

Surprised this switch texture bug was missed. O_o

 

E5M5:

Spoiler

Very hard to see in the pic but looking out in this direction causes a Drawseg overflow.

 

E5M6:

Spoiler

Not a bug but this did give me a slight chuckle. XD

 

More Drawseg overflows.

 

E5M8:

Spoiler

Probably more of an issue with how Sigil was built but yeah, there's a Tutti-Frutti error in many places where this texture is used.

 

E5M9:

Spoiler

T o o t i f r o o t i .

 

Overall this is a pretty good job getting Sigil to run under DOS for the most part, well done! :D

Edited February 24, 2022 by DynamiteKaitorn
Forgot to review it outside of bugs.

[kalensar]

Sigil aint one of my top faves, but For The People I will definitely play this because its remniscent of my own projects 

[the_kovic]

15 hours ago, DynamiteKaitorn said:

I've managed to find several bugs on different maps:

Thank you for your keen eye! I have released version 1.1 which fixes some of the bugs. Download link in the top post updated.

 

Here's the full changelog:

- Fixed VPO in the chaingun secret in E5M1
- Fixed texture errors in E5M2
- Fixed Medusa effect in the soulsphere secret in E5M4
- Fixed noticeable drawseg overflows in E5M5 and E5M6
- Made stairs in E5M6 4 units thicker to prevent a candle from floating
- Changed textures to fix tutti-fruity effect in E5M8
- Changed geometry to fix tutti-fruity effect in E5M9

[viti95]

This is great! Good work! I'll try it on my 386 and see how playable it is :D