Sonic Adventure 2 graphics arrors

[DohlfHauldhagen]

When I play SA2 in Chancast .25, I get errors much like these:

 

http://img294.imageshack.us/img294/4966/sonicxq1.jpg

 

Textures will pop up and block my view, making it difficult to play. It happens often too. Is there any way to fix this, or does the game just always run like this?

 

My specs are:

 

Athlon 64 3200+

1024mb PC3200 RAM

256mb nVidia 6800GS PCIexpress x16 Video Card

 

Thanks.

[Agozer]

Nvidia cards generally suck at emulating Sonic Adventure 2. Not that ATI cards are much better, but ATI cards have less texture bugs. Most of the problems stem from Chankast's inaccurate emulation.

 

In other words, you can't fix it and neither can we.

[Robert]

Maybe the new emulator (DEmul) may work better?

[Agozer]

Not much better, since the sound is horrible and it's slower than Chankast.

[Haldrie]

Wow that pic shows worse graphics then I got when I played that game on Chankast. The sound on the games however greatly depends on how the audio files were compressed for those self boot images that everyone has. At least in the case of background music and stuff.

[DohlfHauldhagen]

Thanks guys, I appreciate it.

[AntiRellik]

Hello, i have problems with the graphics too but at least yours arent as bad as mine.

I can barely play Sonic Adventure 2 like this.

heres a screenshot.

 

 

Anybody knows why the graphics show like this???

I'm running the game from a copied CD, is this the problem?

[Agozer]

Let me guess, you have an integrated graphics chip and it's most likely made by Intel.

 

If I was right, you can forget about trying to play games in Chankast.

[AntiRellik]

Yes, I have an Intel GMA 915 or something like that

 

so this is the problem? God, i wish i had at least an nvidia geforce.

This Intel card sucks.

[Agozer]

Indeed it does. To put it simple, Chankast doesn't work properly with any integrated graphics solutions (ATI's or NVidias integrated models might be an exception, but these are largely untested and/or unreported).

 

Needless to say, Intel's integrated models are the worst in terms of emulation, especially when emulating hardware that does true 3D graphics.

[AntiRellik]

I have played PC games on this laptop, they work just fine.

If I can't emulate anything on Chankast, is this mostly the graphics chips fault or the emulators fault for not being able to work properly with integrated graphic chips?

[Gryph]

I'd say the integrated graphics chip because they lack instruction sets the cards have. However, since I am not an emulator developer, I don't know if the Chankast team could have written code that made it more compatible with integrated chips.

 

But integrated chips are generally bad. It'd be cheaper to buy a Dreamcast than to get a system that can emulate it.

[AntiRellik]

I have a Dreamcast, bad thing is that I don't have any memories to save the game... But the thing is it started to work slower slower slower and slower..... until there was a point that while playing a game it just froze loading a level and dang.

Me and my friend dismanteled the dreamcast and we cleaned it..... thing is we prolly f*cked up the laser and the system now can never read a CD or a GD-ROM in its life.

I live in Argentina, and getting a Dreamcast is impossible.. Speaking of VMUs, i went to this place that has rare items and they wanted to sell me a normal VMU for 100 bucks (equivalent to 33 US Dollars)

This is the main reason i tried emulating dreamcast games on this computer.

 

Too bad Chankast or any type of emulation works with integrated chips, knowing that aprox. 68% of the computers in the world have integrated chips/cards.

[Agozer]

You can't compare PC games and emulated games; it's like comparing apples and oranges. Emulating the graphics on a 3D hardware often requires several advanced techniques in order to emulate the graphics at least in some degree of accuracy. While the DC graphics may not seem like they have that many tricks in them, that doesn't mean that there aren't any "tricks" in the Dreamcast GPU.

 

The graphics chips in these consoles (doesn't really matter which 3D console) are designed for that particular console in mind, and sport features that cannot be emulated with PC graphics cards without extra work. Integrated graphics chip usually have only the barest of necessary features, and the fact that the chips share system RAM doesn't exactly make the thing any better.

 

Developers don't often write emulator with just particular video cards in mind. How they emulate the graphics is what counts. In this case, the Intel chips can't handle the way the emulator does its rendering. More specifically, Chankast uses a technique called hardware Transform & Lighting which is used extensively by the Dreamcast and is supported by most graphics cards. However, Intel chose not to support hardware T&L. IIRC, no GMA chip supports hardware T&L.

[AntiRellik]

I understand now.

 

According to a friend of mine, it's not possible to change my graphics chip unless I change the motherboard and some other stuff.

Do you have idea of what laser I can get for my dreamcast??? would a DVD laser work?? Because not in hell I will be able to get a laser for a dreamcast.