its over its done

src/launch/java/baritone/launch/mixins/MixinRenderChunk.java

@@ -36,42 +36,6 @@ import org.spongepowered.asm.mixin.injection.Redirect;
 @Mixin(RenderChunk.class)
 public class MixinRenderChunk {
 
-    // TODO: (1.13.2) Resolve this issue
-    // Looks like generateCache will return null if the chunk is empty, so we're probably going to want to hook that method
-    /*
-    @Redirect(
-            method = "rebuildChunk",
-            at = @At(
-                    value = "INVOKE",
-                    target = "net/minecraft/world/ChunkCache.isEmpty()Z"
-            )
-    )
-    private boolean isEmpty(ChunkCache chunkCache) {
-        if (!chunkCache.isEmpty()) {
-            return false;
-        }
-        if (Baritone.settings().renderCachedChunks.value && Minecraft.getInstance().getIntegratedServer() == null) {
-            Baritone baritone = (Baritone) BaritoneAPI.getProvider().getPrimaryBaritone();
-            IPlayerContext ctx = baritone.getPlayerContext();
-            if (ctx.player() != null && ctx.world() != null && baritone.bsi != null) {
-                BlockPos position = ((RenderChunk) (Object) this).getPosition();
-                // RenderChunk extends from -1,-1,-1 to +16,+16,+16
-                // then the constructor of ChunkCache extends it one more (presumably to get things like the connected status of fences? idk)
-                // so if ANY of the adjacent chunks are loaded, we are unempty
-                for (int dx = -1; dx <= 1; dx++) {
-                    for (int dz = -1; dz <= 1; dz++) {
-                        if (baritone.bsi.isLoaded(16 * dx + position.getX(), 16 * dz + position.getZ())) {
-                            return false;
-                        }
-                    }
-                }
-            }
-        }
-
-        return true;
-    }
-    */
-
     @Redirect(
             method = "rebuildChunk",
             at = @At(

src/launch/java/baritone/launch/mixins/MixinRenderChunkCache.java

@@ -0,0 +1,46 @@
+/*
+ * This file is part of Baritone.
+ *
+ * Baritone is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Baritone is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Baritone.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package baritone.launch.mixins;
+
+import baritone.Baritone;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.renderer.chunk.RenderChunkCache;
+import net.minecraft.world.chunk.Chunk;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(RenderChunkCache.class)
+public class MixinRenderChunkCache {
+    @Redirect(
+            method = "generateCache",
+            at = @At(
+                    value = "INVOKE",
+                    target = "net/minecraft/world/chunk/Chunk.isEmptyBetween(II)Z"
+            )
+    )
+    private static boolean isEmpty(Chunk chunk, int yStart, int yEnd) {
+        if (!chunk.isEmptyBetween(yStart, yEnd)) {
+            return false;
+        }
+        if (chunk.isEmpty() && Baritone.settings().renderCachedChunks.value && Minecraft.getInstance().getIntegratedServer() == null) {
+            return false;
+        }
+        return true;
+    }
+}

src/launch/resources/mixins.baritone.json

@@ -21,6 +21,7 @@
     "MixinNetHandlerPlayClient",
     "MixinNetworkManager",
     "MixinRenderChunk",
+    "MixinRenderChunkCache",
     "MixinRenderList",
     "MixinVboRenderList"
   ]