Deus Ex: RTX remix (Portal RTX hack) RTX 3080

Описание

Hi,
I had more hopes for this one.

I wanted to upload this earlier on, but i couldn't get past the issues you see in the video, but i think it's worth showing anyway.

The first issue is a shadow projected onto the environment from camera perspective. I had a look at this and i think it's because JC Denton's face mesh attached to camera, and a light is projected from behind camera view, the shadow is always cast into the environment (You can see it is not to do with the in game flashlight toggle)

The second issue is the big one, you can see that faces of geometry flicker rapidly in many cases, this is due to vertex buffer corruption.

I asked an Nvidia engineer who is working on RTX remix for any answers on this.. here is what they said:

'It looks like vertex buffer corruption. We're aware of at least one thing in the Portal Remix release that could cause that sort of behavior, and as we do more compatibility testing with a wider variety of games I wouldn't be surprised if we find a few more.
It'll probably be down to a race condition between Remix trying to render using a vertex buffer in one thread, and the game modifying that vertex buffer in another thread as it gets ready to send the next draw call.
Games in this generation often re-used vertex buffers multiple times in a single frame to render different objects.
If they send a draw call with a vertex buffer, then modify the buffer, then send another draw call with it, they may modify the buffer before we finish copying the original vertex buffer to the GPU.
There's supposed to be flags and locks and things to keep stuff in sync, but the details of the implementation is finicky, and we've already found at least one place we had it wrong when Portal released. eventually we'll match the original implementation very closely and these things shouldn't happen anymore, but it's a long tail to chase'.

Grateful for that explanation!

If you want to try Deus Ex yourself, you can see in the video which textures are selected in the UI to make it easier for you, you can refer back to this for help.

I am using GMDX , and running the directX9 version, no need to use a wrapper, as the game is already dx9 this way! (i don't think there is a viable alternative anyway)

I hope to do more showcases, on some games where it's possible to modify some things like textures and lights, i may also use Omniverse just to show some game environments ported into that.

Thanks for watching.