That stripe is caused by the tutti-frutti effect. In E2M2: Containment Area there is a particular door with the tech wires texture, which has a horizontal green stripe supposed to mark it.The tutti-frutti effect is not present in the Atari Jaguar port of Doom due to use of a different texture format and changes made to its rendering process. If a texture with transparent areas is used as the texture on a one-sided wall, the content of the transparent areas is undefined.
(By definition, the player can see the sector behind a wall only through the middle.) If a texture with transparent areas is used as an upper or lower texture on a two-sided wall, the content of the transparent areas is undefined.If the texture is less than 128 units tall, horizontal bands will be left undefined. But the Doom rendering engine starts new tiles only at heights of 128, 256, 384, etc.
Tutti-frutti can be caused in several ways: These colors are the reason behind the name of the effect. The texture is rendered distorted and there are often colors drawn which are not part of the original texture. The tutti-frutti effect is a texture effect which can appear on walls. ZDoom rendering of same scene showing construction
