RTX Remix / Portal RTX Issue (With potential solution)

[HumanGamer]

In RTX remix (and probably Portal RTX), this check fails:

int dlfgAvailable = 0;
    result = params->Get(NVSDK_NGX_Parameter_FrameGeneration_Available, &dlfgAvailable);
    if (NVSDK_NGX_FAILED(result) || !dlfgAvailable) {
      Logger::info(str::format("NVIDIA DLSS Frame Generation not available on this hardware/platform: ", resultToString(result)));
      return false;
    }

It looks like it checks if FG should be supported using NVSDK_NGX_VULKAN_GetCapabilityParameters, which is currently just being proxied to the original dll. It probably needs to be overwritten to tell it that it's available.

result = NVSDK_NGX_VULKAN_GetCapabilityParameters(&tempParams);
    if (NVSDK_NGX_FAILED(result)) {
      Logger::err(str::format("NVSDK_NGX_VULKAN_GetCapabilityParameters failed: ", resultToString(result)));
      return false;
    }

https://github.com/NVIDIAGameWorks/dxvk-remix/blob/69bf38e89be5b185564516a8fa4e7bdda9b2ddfa/src/dxvk/rtx_render/rtx_ngx_wrapper.cpp#L254

https://github.com/NVIDIAGameWorks/dxvk-remix/blob/69bf38e89be5b185564516a8fa4e7bdda9b2ddfa/src/dxvk/rtx_render/rtx_ngx_wrapper.cpp#L115

[Z4ndyz]

Well you answered one of my questions in another issue so it was as i suspected, it's failing completely (and defaulting to random duplicating of frames) because of DXVK. DXVK is currently not officialy supported in this version of FSR so this might be the reason why it's not working currently. Most likely we'll need AMD to update the dll but who knows

[Nukem9]

It's not specifically because of DXVK, it's the lack of Vulkan support. RTX Remix won't work until then. Don't even bother trying.

FSR 3 supposedly works with Vulkan. However I don't have infinite time to implement it in this DLL.

[EliteCombineSoldier]

It's not specifically because of DXVK, it's the lack of Vulkan support. RTX Remix won't work until then. Don't even bother trying.

FSR 3 supposedly works with Vulkan. However I don't have infinite time to implement it in this DLL.

wasnt FSR 3 support for vulkan WIP and the source code for it not out yet?