fix: lamp halos not rendering properly

core/src/main/java/mrtjp/projectred/core/client/HaloRenderer.java

@@ -86,6 +86,9 @@ public class HaloRenderer {
     private static final LinkedList<HaloRenderData> entityHalos = new LinkedList<>();
     // Global offset for moving block entities
     private static final Vector3 offset = Vector3.ZERO.copy();
+    // Used for Forge bug workaround. See onRenderLevelStageEvent
+    // TODO remove when porting to > 1.20.1
+    private static @Nullable PoseStack capturedPoseStack = null;
 
     //region Init and event handlers
     public static void init() {
@@ -108,7 +111,20 @@ public void onMovingPostRender() {
     public static void onRenderLevelStageEvent(final RenderLevelStageEvent event) {
         if (event.getStage().equals(AFTER_PARTICLES)) {
             onRenderStageAfterParticles(event);
+            capturedPoseStack = event.getPoseStack();
         } else if (event.getStage().equals(AFTER_LEVEL)) {
+            // Workaround for non-backported Forge bug where the AFTER_LEVEL call gets the wrong PoseStack. We will retain the valid
+            // PoseStack from the AFTER_PARTICLE call and reuse it here.
+            // https://github.com/neoforged/NeoForge/pull/231
+            // https://github.com/MrTJP/ProjectRed/issues/1868
+            // TODO remove when porting to > 1.20.1
+            if (capturedPoseStack != null) {
+                var e2 = new RenderLevelStageEvent(event.getStage(), event.getLevelRenderer(), capturedPoseStack, event.getProjectionMatrix(), event.getRenderTick(), event.getPartialTick(), event.getCamera(), event.getFrustum());
+                capturedPoseStack = null;
+                onRenderStageAfterLevel(e2);
+                return;
+            }
+
             onRenderStageAfterLevel(event);
         }
     }
@@ -217,7 +233,7 @@ private static void onRenderStageAfterLevel(final RenderLevelStageEvent event) {
             List<HaloRenderData> lightList = pollHalos(levelHalos);
 
             // Prepare render
-            Vec3 cam = Minecraft.getInstance().getEntityRenderDispatcher().camera.getPosition();
+            Vec3 cam = event.getCamera().getPosition();
             PoseStack stack = event.getPoseStack();
             stack.pushPose();
             stack.translate(-cam.x, -cam.y, -cam.z);