Game:

Doom (1993)

Duration: 5:35

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10

Different tricks for PSX Doom which can't be done by usual ways (Final Doom in this case). Actual Playstation Doom format, can be done on console.
Many things that were previously impossible could be accomplished using full transparent texture/flat.
In detail:
-Proper 3D bridges without texture "bleeding".
-Ambushes like standing cyberdemons on Cyberden. Lower texture is transparent.
-Proper walls which have midtextures on only one side, like at the start of Habitat. Actually back side is transparent texture.
-Possibility to see only back side of inner sector without seeing front side! Maybe this would be as idea for surreal maps.
-Extended fake 3D effect (ceilings) where you can apply transparent texture and make more complex construction. As example hide some back sides.
-Structures very high in sky, with fake floors, where lower texture is transparent.
-Making "horison sky" lines without adding dummy sectors. In case if there are no other sectors behind, probably.
-Proper scrolling midtextures (both sides) with using of two nearby lines, without seeing their back sides.
-Transparent flat have no particular importance, but with the help of it you can see what lies above or below, even sky on floor. Pity that skies do not doubling though.

More other features were shown in the video:
-Fast scrolling for walls, Find Side feature. It's worked usually on 2 or 4 similar pillars/closets nearby, like the Spirit World ones.
-One more interesting finding related to "Clip Mid-Texture" flag, only can be done in Final Doom. Using this flag on upper textures (where ceilings lowered to floors), with usage of midtextures, VINE1 as example, it's possible to "stick" the middle texture to the upper, and create the impression as if it's a new texture! This is very effective in order to save space, especially it's don't have any negative effect. So those who do levels with vine textures, you can try. Moreover by this method can be used translucent waterfall sticked to any other upper wall texture, as example.

Special thanks to GEC tools for PSX Doom: https://www.doomworld.com/forum/topic/101161
Used ePSXe emulator to play.

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