wobble wobble wobble

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wobble wobble wobble Anonymous Wed Apr 24 15:19:55 2019 No.5524783 [Reply] [Original]

What was the technical reason behind PSX textures being all wobbly and wavy? Hardware noob here but preety much fascinated by why early low-poly models acted like that. N64 seemed to be more stable in that matter

>>	Anonymous Wed Apr 24 15:21:21 2019 No.5524792 https://retrocomputing.stackexchange.com/questions/5019/why-do-3d-models-on-the-playstation-1-wobble-so-much

Anonymous Wed Apr 24 15:35:03 2019 No.5524856

1. PSX used affine texture mapping instead of perspective-correct mapping like the N64, because it was faster to compute and because the PSX didn't have a Z buffer. This means textures warp as the perspective changes.
2. PSX used fixed point values for polygon vertices instead of floating point, so the coordinates weren't as accurate. The "wobble" is caused by the vertices being rounded between two different values.

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