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#1 Nov 25, 2012 7:18 AM

naruto200
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Optical illusion glitches on Spyro 3

I have recorded an optical illusion glitch on Spyro 3.
http://www.youtube.com/watch?v=CboOloUo … e=youtu.be
And I was wondering if any of you guys knew any.


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#2 Nov 25, 2012 2:08 PM

Gekoncze
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Re: Optical illusion glitches on Spyro 3

Yup. I guess that this is special technique used in spyro games. This make it possible to move spyro nearer walls than he could normally move. Because if he moved too close to the wall (without this effect), his head would partialy disappear in the wall, so to fix this they use this special effect to make it look better when spyro is near wall, but it is a little bit glitchy. I would like to learn how to do this technique, so I can use it in the fututre in my games smile
( another method they could use is to make spyro collision area larger, but it would be propably annoying in gameplay )

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#3 Nov 27, 2012 1:33 PM

Sheep
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Re: Optical illusion glitches on Spyro 3

Why this happens is because of how the PS1 does 3d graphics. Instead of using a z-buffer like in N64 games, and most modern 3d graphics systems, the game developers had to sort the drawing order all the triangles based on the distance to the camera, back to front, and draw the whole of every triangle. It would be impossible to draw one triangle sticking into another one, and as I have tried to illustrate, the ground would obscure parts of Spyro even if he is clearly above it:
ps13d.png
The distance to the green ground triangle is shorter than that to the triangles on Spyro's tail.
To counter this problem, they have given Spyro's triangles, and those of every other character or object in the game an offset to the depth, so that the sorting mechanism thinks that they are closer to the camera than they actually are.

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#4 Nov 27, 2012 3:19 PM

ontels
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Re: Optical illusion glitches on Spyro 3

Making games is complicated huh? o.O


wink

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#5 Dec 01, 2012 10:48 AM

Gekoncze
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Re: Optical illusion glitches on Spyro 3

Sheep wrote:

Why this happens is because of how the PS1 does 3d graphics. Instead of using a z-buffer like in N64 games, and most modern 3d graphics systems, the game developers had to sort the drawing order all the triangles based on the distance to the camera, back to front, and draw the whole of every triangle. It would be impossible to draw one triangle sticking into another one, and as I have tried to illustrate, the ground would obscure parts of Spyro even if he is clearly above it:
ps13d.png
The distance to the green ground triangle is shorter than that to the triangles on Spyro's tail.
To counter this problem, they have given Spyro's triangles, and those of every other character or object in the game an offset to the depth, so that the sorting mechanism thinks that they are closer to the camera than they actually are.

wow, you know a lot about graphics smile

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#6 Dec 01, 2012 12:00 PM

Sheep
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Re: Optical illusion glitches on Spyro 3

Blako wrote:

wow, you know a lot about graphics smile

Thanks:) I've learned a bit from making my own 3d engines in Game Maker and 2d html5 canvas, and studying my favorite games, which are mostly ps1.

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#7 Jul 26, 2013 3:09 AM

Sear/Burst
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Re: Optical illusion glitches on Spyro 3

Oh my gud, yu r some game expert.

But anyway, 200, I'm just wondering, HOW DID YOU GET SPYRO ON YOUR COMPUTER!?!?!?! Not that MY computer is fast enough to play that. In fact, it'll probably crash.

Let me guess, the computer accepts PlayStation games? I'll have to try that sometime. I even have a PlayStation-controller-like remote for computers! big_smile


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#8 Jul 26, 2013 12:35 PM

ccrogers15
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Re: Optical illusion glitches on Spyro 3

Yep this happens alot near corners of items. Especially trees.


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#9 Jul 26, 2013 2:24 PM

Hwd45
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Re: Optical illusion glitches on Spyro 3

Sear/Burst wrote:

Oh my gud, yu r some game expert.

But anyway, 200, I'm just wondering, HOW DID YOU GET SPYRO ON YOUR COMPUTER!?!?!?! Not that MY computer is fast enough to play that. In fact, it'll probably crash.

Let me guess, the computer accepts PlayStation games? I'll have to try that sometime. I even have a PlayStation-controller-like remote for computers! big_smile

They're quite clearly playing an emulator. It even says so at the top of the screen in the video tongue


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#10 Jul 24, 2014 9:18 PM

Attackfrog277
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Re: Optical illusion glitches on Spyro 3

Video desn't work so I don't know exaclty what you are refering to. Do you mean the parts where Spyro's legs looks flat like paper when animated?

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#11 Jul 24, 2014 9:54 PM

NeoReaper
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Re: Optical illusion glitches on Spyro 3

Over a year ago revive # # #


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#12 Jul 24, 2014 11:32 PM

Stormy
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Re: Optical illusion glitches on Spyro 3

Yeah, that video would be a few years old by now, but based on the comments and what I remember, it showed Spyro standing right next to a tree or something, and when the camera moved, Spyro appeared to be a different distance from it.


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