This does not appear to be necessary anymore

Saves us a headache in the 1.20.4 port

Fabric/src/main/java/vazkii/botania/fabric/client/FabricClientInitializer.java

@@ -1,7 +1,5 @@
 package vazkii.botania.fabric.client;
 
-import com.mojang.blaze3d.vertex.BufferBuilder;
-
 import net.fabricmc.api.ClientModInitializer;
 import net.fabricmc.fabric.api.blockrenderlayer.v1.BlockRenderLayerMap;
 import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientLifecycleEvents;
@@ -17,7 +15,6 @@
 import net.minecraft.client.gui.screens.MenuScreens;
 import net.minecraft.client.particle.ParticleProvider;
 import net.minecraft.client.particle.SpriteSet;
-import net.minecraft.client.renderer.RenderType;
 import net.minecraft.client.renderer.blockentity.BlockEntityRenderers;
 import net.minecraft.client.renderer.entity.EntityRendererProvider;
 import net.minecraft.client.renderer.entity.LivingEntityRenderer;
@@ -38,7 +35,6 @@
 import vazkii.botania.client.core.handler.KonamiHandler;
 import vazkii.botania.client.core.handler.MiscellaneousModels;
 import vazkii.botania.client.core.helper.CoreShaders;
-import vazkii.botania.client.core.helper.RenderHelper;
 import vazkii.botania.client.core.proxy.ClientProxy;
 import vazkii.botania.client.fx.BotaniaParticles;
 import vazkii.botania.client.gui.HUDHandler;
@@ -59,13 +55,11 @@
 import vazkii.botania.common.item.equipment.armor.manasteel.ManasteelArmorItem;
 import vazkii.botania.common.lib.LibMisc;
 import vazkii.botania.fabric.network.FabricPacketHandler;
-import vazkii.botania.mixin.client.RenderBuffersAccessor;
 import vazkii.botania.xplat.XplatAbstractions;
 import vazkii.patchouli.api.BookDrawScreenCallback;
 
 import java.io.IOException;
 import java.io.UncheckedIOException;
-import java.util.SortedMap;
 import java.util.function.Function;
 
 public class FabricClientInitializer implements ClientModInitializer {
@@ -161,10 +155,6 @@ private static void registerArmors() {
 	private void loadComplete(Minecraft mc) {
 		ColorHandler.submitBlocks(ColorProviderRegistry.BLOCK::register);
 		ColorHandler.submitItems(ColorProviderRegistry.ITEM::register);
-
-		// Needed to prevent mana pools on carts from X-raying through the cart
-		SortedMap<RenderType, BufferBuilder> layers = ((RenderBuffersAccessor) mc.renderBuffers()).getEntityBuilders();
-		layers.put(RenderHelper.MANA_POOL_WATER, new BufferBuilder(RenderHelper.MANA_POOL_WATER.bufferSize()));
 	}
 
 	private void initAuxiliaryRender(EntityType<? extends LivingEntity> type, LivingEntityRenderer<?, ?> renderer,

Forge/src/main/java/vazkii/botania/forge/client/ForgeClientInitializer.java

@@ -1,15 +1,13 @@
 package vazkii.botania.forge.client;
 
 import com.google.common.base.Suppliers;
-import com.mojang.blaze3d.vertex.BufferBuilder;
 
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.screens.MenuScreens;
 import net.minecraft.client.gui.screens.inventory.tooltip.ClientTooltipComponent;
 import net.minecraft.client.particle.ParticleProvider;
 import net.minecraft.client.particle.SpriteSet;
 import net.minecraft.client.renderer.ItemBlockRenderTypes;
-import net.minecraft.client.renderer.RenderType;
 import net.minecraft.client.renderer.ShaderInstance;
 import net.minecraft.client.renderer.entity.player.PlayerRenderer;
 import net.minecraft.client.renderer.item.ItemProperties;
@@ -30,7 +28,6 @@
 import net.minecraftforge.eventbus.api.SubscribeEvent;
 import net.minecraftforge.fml.common.Mod;
 import net.minecraftforge.fml.event.lifecycle.FMLClientSetupEvent;
-import net.minecraftforge.fml.event.lifecycle.FMLLoadCompleteEvent;
 
 import vazkii.botania.api.BotaniaAPI;
 import vazkii.botania.api.BotaniaForgeClientCapabilities;
@@ -39,7 +36,6 @@
 import vazkii.botania.client.BotaniaItemProperties;
 import vazkii.botania.client.core.handler.*;
 import vazkii.botania.client.core.helper.CoreShaders;
-import vazkii.botania.client.core.helper.RenderHelper;
 import vazkii.botania.client.core.proxy.ClientProxy;
 import vazkii.botania.client.fx.BotaniaParticles;
 import vazkii.botania.client.gui.HUDHandler;
@@ -59,7 +55,6 @@
 import vazkii.botania.common.item.BotaniaItems;
 import vazkii.botania.common.item.equipment.bauble.RingOfDexterousMotionItem;
 import vazkii.botania.forge.CapabilityUtil;
-import vazkii.botania.mixin.client.RenderBuffersAccessor;
 import vazkii.botania.xplat.ClientXplatAbstractions;
 import vazkii.botania.xplat.XplatAbstractions;
 import vazkii.patchouli.api.BookDrawScreenEvent;
@@ -69,7 +64,6 @@
 import java.util.Collections;
 import java.util.IdentityHashMap;
 import java.util.Map;
-import java.util.SortedMap;
 import java.util.function.Function;
 import java.util.function.Supplier;
 
@@ -215,14 +209,6 @@ private static void attachEntityCapabilities(AttachCapabilitiesEvent<Entity> e)
 		}
 	}
 
-	@SubscribeEvent
-	public static void loadComplete(FMLLoadCompleteEvent evt) {
-		// Needed to prevent mana pools on carts from X-raying through the cart
-		SortedMap<RenderType, BufferBuilder> layers = ((RenderBuffersAccessor) Minecraft.getInstance()
-				.renderBuffers()).getEntityBuilders();
-		layers.put(RenderHelper.MANA_POOL_WATER, new BufferBuilder(RenderHelper.MANA_POOL_WATER.bufferSize()));
-	}
-
 	@SubscribeEvent
 	public static void registerModelLoader(ModelEvent.RegisterGeometryLoaders evt) {
 		evt.register(ClientXplatAbstractions.FLOATING_FLOWER_MODEL_LOADER_ID.getPath(),

Xplat/src/main/resources/botania_xplat.mixins.json

@@ -73,7 +73,6 @@
     "client.RecipeBookComponentAccessor",
     "client.RecipeBookComponentMixin",
     "client.RecipeBookPageAccessor",
-    "client.RenderBuffersAccessor",
     "client.RenderTypeAccessor",
     "client.SkullBlockRendererMixin",
     "client.SoundEngineMixin",