From 7d4c0155f0e43a7a65cba6e26d2aa6274309cbf3 Mon Sep 17 00:00:00 2001
From: Lubos <tridosm@gmail.com>
Date: Tue, 2 Dec 2025 16:21:01 +0100
Subject: [PATCH] OpenXR - Swapchain indexing fixed

---
 Common/VR/VRRenderer.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Common/VR/VRRenderer.cpp b/Common/VR/VRRenderer.cpp
index c2d16f30fa..fb52e95584 100644
--- a/Common/VR/VRRenderer.cpp
+++ b/Common/VR/VRRenderer.cpp
@@ -342,6 +342,12 @@ bool VR_InitFrame( engine_t* engine ) {
 	hmdorientation = XrQuaternionf_ToEulerAngles(invViewTransform[0].orientation);
 	IN_VRInputFrame(engine);
 
+	for (int i = 0; i < ovrMaxNumEyes; i++) {
+		ovrFramebuffer* frameBuffer = &engine->appState.Renderer.FrameBuffer[i];
+		frameBuffer->TextureSwapChainIndex++;
+		frameBuffer->TextureSwapChainIndex %= frameBuffer->TextureSwapChainLength;
+	}
+
 	engine->appState.LayerCount = 0;
 	memset(engine->appState.Layers, 0, sizeof(ovrCompositorLayer_Union) * ovrMaxLayerCount);
 	return true;