Dreamcast/bumpmapping

[beanboy]

Wow! A basket weave patterned road and grass. Nice effect.

[p1pkin]

I went back to f1 racing championship on the dreamcast and replaced what I thought was the bump map for the road and grass just to confirm the game uses bumpmapping . And yes it does, the road and grass became bick like.

how do you 'confirmed' F1 Racing game uses bump-mapping ?
I've logged renderer list during gameplay and see there no any BUMPMAP-type textures usage, only common ARGB1555 and a bit of ARGB4444 textures.
am I missing something and there need to check some specific circuit course ?

huh, I guess many games on the dc could be using bumpmapping but we wouldnt know at all because for some reason its not noticeable .

huh, back in the days, I've run in emulator with special logging code most of games from TOSEC DC set, but Rayman 2 was the only game where emulator yell'd "hey! bummap was used!".
also, I highly doubt such effects might be visually noticeable in Dreamcast games. for example Rayman 2 - no one at DC scene was aware of this game uses bumpmaps, until 7 year ago when we discovered it during this game renderer analysis.

[Ryo_Hazuki]

I went back to f1 racing championship on the dreamcast and replaced what I thought was the bump map for the road and grass just to confirm the game uses bumpmapping . And yes it does, the road and grass became bick like.

how do you 'confirmed' F1 Racing game uses bump-mapping ?
I've logged renderer list during gameplay and see there no any BUMPMAP-type textures usage, only common ARGB1555 and a bit of ARGB4444 textures.
am I missing something and there need to check some specific circuit course ?

huh, I guess many games on the dc could be using bumpmapping but we wouldnt know at all because for some reason its not noticeable .

huh, back in the days, I've run in emulator with special logging code most of games from TOSEC DC set, but Rayman 2 was the only game where emulator yell'd "hey! bummap was used!".
also, I highly doubt such effects might be visually noticeable in Dreamcast games. for example Rayman 2 - no one at DC scene was aware of this game uses bumpmaps, until 7 year ago when we discovered it during this game renderer analysis.

Very interesting.
Have you tested the tomb raider iv?

[Anthony817]

Didn't Soul Calibur also have Bump mapping on some of the stages ground textures?

[p1pkin]

Didn't Soul Calibur also have Bump mapping on some of the stages ground textures?

no, there is no bump maps in Soul Calibur, just good looking textures. I suppose you meant like ground at Sophitia's stage and similar.

Very interesting.
Have you tested the tomb raider iv?

iirc I've checked it at very beginning. but I can check later stages too, if someone will provide game save(s).

[Ian Micheal]

Emulators years ago dc one's did not even support bump mapping



2 years ago this emulator supported it for 2 games.. so even if there was you would not of seen it

Homebrew showing bump mapping on dreamcast

No bump mapping


Heavy bump mapping

heavy bump map applied, looks damn cool when you move the light source. Bottom image: base texture + bump map + environment map (pink / black)


http://yam.20to4.net/dreamcast/index_old.html

As you can see if you go to the site and read it yes it can be done proof is right there on that site

[p1pkin]

Emulators years ago dc one's did not even support bump mapping
2 years ago this emulator supported it for 2 games.. so even if there was you would not of seen it

to make things more clear:
- Demul have bumpmap support since May 2013, i.e. 7 years ago as I've said earlier. (other slowpoke emulators did the same 5+years later, as usual, heh)
- I'm one of Demul developers, who discovered bumpmap in Rayman 2, and later was trying to find it in other games

Homebrew showing bump mapping on dreamcast

sadly, that homebrew is not available, all we have is just that screenshots.
speaking of demos - bump was used in this scene demo, cube model texture at 2:15


but we was talking about DC games, isn't it ?

[Ian Micheal]

Very cool I use demul when i cant use hardware I wish the demo was around to.. Some of the others ar enot working right instant dma can read from 2 places at the same time from the gdrom.. etc double buffer not working list goes on really.. Demul is close to how the hardware works still not perfect nothing can be but it's close.. still faster about 5 to 10% in DMA speed then the real hardware.. so developing on any dreamcast emulator is a fools gold

[cloofoofoo]

I went back to f1 racing championship on the dreamcast and replaced what I thought was the bump map for the road and grass just to confirm the game uses bumpmapping . And yes it does, the road and grass became bick like.

how do you 'confirmed' F1 Racing game uses bump-mapping ?
I've logged renderer list during gameplay and see there no any BUMPMAP-type textures usage, only common ARGB1555 and a bit of ARGB4444 textures.
am I missing something and there need to check some specific circuit course ?

huh, I guess many games on the dc could be using bumpmapping but we wouldnt know at all because for some reason its not noticeable .

huh, back in the days, I've run in emulator with special logging code most of games from TOSEC DC set, but Rayman 2 was the only game where emulator yell'd "hey! bummap was used!".
also, I highly doubt such effects might be visually noticeable in Dreamcast games. for example Rayman 2 - no one at DC scene was aware of this game uses bumpmaps, until 7 year ago when we discovered it during this game renderer analysis.

Actually I was wrong. It was a detail texture blended on top.
I noticed nulldc had a specific behavior . I used a program to dump the textures as they are being loaded so I used the multi bump map demo. Everytime you switch texture it supposed to switch bumpmap to match it. I can see the diffuse texture dumped but nulldc would not create the bumpmap instead it would just say unhandled texture in the console. That why realized f1 championship racing was just blending texture. It does the same for Rayman 2, on the first level there seems to be two textures that aren't loaded.
IAM guessing those are the bumpmaps.

[p1pkin]

I see, and yes, NullDC might be used to check such cases based on that error message.

there is also another but not widely known bumpmap usage example - in Shenmue 2, medals / coins which player may get for special/secret achievements.
more details there https://www.shenmuedojo.net/forum/viewtopic.php?t=46918
I've extracted both bumpmap and regular textures used for bronze and silver medals, in original PVRT format, see attachment.

so, in total we have 2 confirmed Dreamcast games which uses bump map feature - Rayman 2 (grass at 1st level) and Shenmue 2 (bronze, silver and gold medals).