actually works

src/api/java/baritone/api/Settings.java

@@ -445,6 +445,11 @@ public class Settings {
      */
     public Setting<Boolean> pathThroughCachedOnly = new Setting<>(false);
 
+    /**
+     * 😎
+     */
+    public Setting<Boolean> renderCachedChunks = new Setting<>(false);
+
     /**
      * Whether or not to use the "#" command prefix
      */

src/launch/java/baritone/launch/mixins/MixinChunkCache.java

@@ -38,9 +38,21 @@ public class MixinChunkCache {
     private void getBlockState(BlockPos pos, CallbackInfoReturnable<IBlockState> ci) {
         Baritone baritone = (Baritone) BaritoneAPI.getProvider().getPrimaryBaritone();
         IPlayerContext ctx = baritone.getPlayerContext();
-        if (ctx.player() != null && ctx.world() != null && baritone.bsi != null) {
+        if (ctx.player() != null && ctx.world() != null && baritone.bsi != null && Baritone.settings().renderCachedChunks.get()) {
             ci.setReturnValue(baritone.bsi.get0(pos));
-            //ci.setReturnValue(Blocks.DIRT.getDefaultState());
+        }
+    }
+
+    @Inject(
+            method = "isEmpty",
+            at = @At("HEAD"),
+            cancellable = true
+    )
+    private void isEmpty(CallbackInfoReturnable<Boolean> ci) {
+        Baritone baritone = (Baritone) BaritoneAPI.getProvider().getPrimaryBaritone();
+        IPlayerContext ctx = baritone.getPlayerContext();
+        if (ctx.player() != null && ctx.world() != null && baritone.bsi != null && Baritone.settings().renderCachedChunks.get()) {
+            ci.setReturnValue(false);
         }
     }
 }

src/launch/java/baritone/launch/mixins/MixinChunkRenderWorker.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 baritone.api.BaritoneAPI;
+import baritone.api.utils.IPlayerContext;
+import net.minecraft.client.renderer.chunk.ChunkRenderWorker;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(ChunkRenderWorker.class)
+public class MixinChunkRenderWorker {
+    @Inject(
+            method = "isChunkExisting",
+            at = @At("HEAD"),
+            cancellable = true
+    )
+    private void isChunkExisting(BlockPos pos, World world, CallbackInfoReturnable<Boolean> ci) {
+        Baritone baritone = (Baritone) BaritoneAPI.getProvider().getPrimaryBaritone();
+        IPlayerContext ctx = baritone.getPlayerContext();
+        if (ctx.player() != null && ctx.world() != null && baritone.bsi != null && Baritone.settings().renderCachedChunks.get()) {
+            ci.setReturnValue(baritone.bsi.isLoaded(pos.getX(), pos.getZ()));
+        }
+    }
+}
+

src/launch/resources/mixins.baritone.json

@@ -13,6 +13,7 @@
     "MixinChunkCache",
     "MixinChunkProviderClient",
     "MixinChunkProviderServer",
+    "MixinChunkRenderWorker",
     "MixinEntity",
     "MixinEntityLivingBase",
     "MixinEntityPlayerSP",

src/main/java/baritone/utils/ExampleBaritoneControl.java

@@ -24,6 +24,7 @@ import baritone.api.cache.IWaypoint;
 import baritone.api.event.events.ChatEvent;
 import baritone.api.pathing.goals.*;
 import baritone.api.pathing.movement.ActionCosts;
+import baritone.api.utils.BetterBlockPos;
 import baritone.api.utils.SettingsUtil;
 import baritone.behavior.Behavior;
 import baritone.behavior.PathingBehavior;
@@ -35,6 +36,7 @@ import baritone.pathing.movement.Moves;
 import baritone.process.CustomGoalProcess;
 import baritone.utils.pathing.SegmentedCalculator;
 import net.minecraft.block.Block;
+import net.minecraft.client.Minecraft;
 import net.minecraft.client.multiplayer.ChunkProviderClient;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.player.EntityPlayer;
@@ -284,6 +286,12 @@ public class ExampleBaritoneControl extends Behavior implements Helper {
             logDirect("Baritone settings reset");
             return true;
         }
+        if (msg.equals("render")) {
+            BetterBlockPos pf = ctx.playerFeet();
+            Minecraft.getMinecraft().renderGlobal.markBlockRangeForRenderUpdate(pf.x - 500, pf.y - 500, pf.z - 500, pf.x + 500, pf.y + 500, pf.z + 500);
+            logDirect("okay");
+            return true;
+        }
         if (msg.equals("echest")) {
             Optional<List<ItemStack>> contents = baritone.getMemoryBehavior().echest();
             if (contents.isPresent()) {