Forza Horizon 1 & 2 - invisible terrain

[CookiePLMonster]

After recent (38bf6c8) PR merges Forza Horizon goes ingame with reasonably good performance, however terrain is missing:

As far as I can tell, only terrain geometry is missing. In Forza Horizon 2, those issues happen too but somehow are less pronounced:

Running in Debug/Checked reveals an interesting issue - namely, this assert is hit, although variables tested by it are not used anymore!

      assert_true(!fetch_instr.attributes.stride ||
                  vertex_binding.stride_words == fetch_instr.attributes.stride);

Even then, it's the only game I am aware of to hit this assert - so perhaps it is a lead despite the fact it's asserting attributes currently unused by Xenia.

Forza Horizon 1 log, if it's of any use:
xenia.zip

[arcadee1977]

Forza Horizon 2 : A few minutes after the game runs, some objects will appear some weird colors similar to self illumination ：

[Pablo96]

I am not an expert on this but for sure is a thing on loading vertex of the terrrain since always terrains work very differently from other assets. I would love too look this up but have no clue where to start with this emulator or if a xbox 360 is needed. Also I just saw that it only get stuck on that assert if you run on debug mode. Since the prebuilt executable run pass this assert

[JoelLinn]

We emulate the GPU on the hardware level because D3D and the GPU driver are linked statically to the game executable. It all gets a tad more complicated due to this. You can join the discord to get in touch with the developers.

[Pablo96]

@JoelLinn Hi, I already am on discord however I dont have access to the dev room.

[JoelLinn]

You can ask in #xenia, maybe ping triangel. Somebody will give you the rights at some point

…

On 20. May 2021, at 02:18, Pablo Narvaja ***@***.***> wrote:  @JoelLinn Hi, I already am on discord however I dont have access to the dev room. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or unsubscribe.

[Xaonix227]

thank you

[legend800]

Can we please lock this thread to avoid hearing idiotic comments by this moron? Thanks.

[Gruphius]

I'm having a simmilar issue. I have the same terrain missing, however the game runs horribly. The screen freezes, but the game itself keeps running at normal speed. Also it seems that when I crash my car ingame with enough force I even crash Xenia.

[mohalisad]

I can confirm that this problem is fixed in canary version and you can close this issue.
Example footage:
https://www.youtube.com/watch?v=zA6MR2PSE1A

[Margen67]

I can confirm that this problem is fixed in canary version and you can close this issue. Example footage: youtube.com/watch?v=zA6MR2PSE1A

This issue tracker is for master. It can't be closed until it's fixed on master.

[dede24px]

Hello, anyone experienced this kind of shadow bug under the cars??
Appeared on Xenia Canary Aug 24, 2022, and the latest build of end of July 2023...
Thank you

[Pipi86]

I can confirm that this problem is fixed in canary version and you can close this issue. Example footage: https://www.youtube.com/watch?v=zA6MR2PSE1A

This invisibility bug it's not completely fixed in Forza Horizon 2 using Xenia Canary, as there's still some invisible car parts (a bug that was fixed at least on Forza Horizon 1). One example is the invisible car rims when inspecting a car in the car dealer, another one the rear view mirrors sometimes flickering or even always invisible.