ZDoom

Autochthonic Mode causes a square aspect ratio so that geometry becomes more uniform and realistic like Quake.
A working preview of the next release which has a universal version of BigButts built-in.

Clicking the image will show an A/B animation:

Spoiler: Old Stuff

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AChthonic.pk3

(1.99 KiB) Downloaded 296 times

If you use Bloom (which can prevent the weapon from warping) you may want to load this wad to re-widen DooM's HUD weapons:

BigButts.wad

(3.91 KiB) Downloaded 225 times

Awesome stuff, dude! I've been looking for something like this, since I'm typically a fan of body perspective in FPS games (Nash's weapon-sway mod comes to mind). Though, now I'm wondering if it's possible to create a similar effect for the weaponbob similar to that of Quake's weaponbob. I'm guessing it'd be a shader that affects the pixel range on the x axis while playeractorz veloctiy (or whatever the term is) reaches above a certain range, however I can't be sure as I'm not well versed with zscript...let alone decorate for that matter! Thoughts?

When I get around to copying the Dolly Effect for when the player is accelerating, I'll give that a whirl. I think what you're describing might be in the same ballpark method-wise. My ZScript is pretty lacking though so thanks for pointing out the playeractorz thing

P.S. This thread was to be deleted a while ago as Pitch, Please! was retitled Autochthonic Widescreen and combined into ScreeM. However I've found a situation where another shader needs to be loaded between the two and so P,P! will return here again soon (with improvements over the ScreeM version).

Got it, I'll keep my eye on the screem shader then. Looking forward to the next iteration!

Next iteration up!

The math is less of a combination of flukes and guesses and it's now done by texel processing so it shouldn't cause blurring. I've given it a menu now that there are multiple modes to choose from and added a "semi-useful" letterbox effect as well.

Sorry for necroposting, but you are a god.