diff --git a/common/src/lib/java/dev/engine_room/flywheel/lib/visual/component/ShadowComponent.java b/common/src/lib/java/dev/engine_room/flywheel/lib/visual/component/ShadowComponent.java
index 2a86de5eca..a5955d86d0 100644
--- a/common/src/lib/java/dev/engine_room/flywheel/lib/visual/component/ShadowComponent.java
+++ b/common/src/lib/java/dev/engine_room/flywheel/lib/visual/component/ShadowComponent.java
@@ -17,6 +17,7 @@
 import dev.engine_room.flywheel.lib.model.QuadMesh;
 import dev.engine_room.flywheel.lib.model.SingleMeshModel;
 import dev.engine_room.flywheel.lib.visual.util.InstanceRecycler;
+import dev.engine_room.flywheel.lib.util.ShadersModHelper;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.Lightmap;
 import net.minecraft.client.renderer.texture.OverlayTexture;
@@ -56,6 +57,7 @@ public final class ShadowComponent implements EntityComponent {
 	private final VisualizationContext context;
 	private final Entity entity;
 	private final Level level;
+	private final boolean shaderPackShadowSuppressed;
 	private final BlockPos.MutableBlockPos pos = new BlockPos.MutableBlockPos();
 
 	private final InstanceRecycler<ShadowInstance> instances = new InstanceRecycler<>(this::createInstance);
@@ -68,6 +70,7 @@ public ShadowComponent(VisualizationContext context, Entity entity) {
 		this.context = context;
 		this.entity = entity;
 		this.level = entity.level();
+		this.shaderPackShadowSuppressed = ShadersModHelper.isShaderPackInUse();
 	}
 
 	private ShadowInstance createInstance() {
@@ -118,7 +121,7 @@ public void beginFrame(DynamicVisual.Context context) {
 
 		boolean shadowsEnabled = Minecraft.getInstance().options.entityShadows()
 				.get();
-		if (shadowsEnabled && radius > 0 && !entity.isInvisible()) {
+		if (shadowsEnabled && !shaderPackShadowSuppressed && radius > 0 && !entity.isInvisible()) {
 			setupInstances(context);
 		}
 
@@ -181,18 +184,25 @@ private void setupInstance(ChunkAccess chunk, MutableBlockPos pos, float entityX
 		int y = pos.getY() - renderOrigin.getY() + 1; // +1 since we moved the pos down.
 		int z = pos.getZ() - renderOrigin.getZ();
 
-		double minX = x + shape.min(Axis.X);
+		double entityLocalX = entityX - renderOrigin.getX();
+		double entityLocalZ = entityZ - renderOrigin.getZ();
+		// Do not submit a whole block for a small-radius shadow; clipping here keeps the
+		// primitive and its UV domain bounded by the same radius.
+		double minX = Math.max(x + shape.min(Axis.X), entityLocalX - radius);
 		double minY = y + shape.min(Axis.Y);
-		double minZ = z + shape.min(Axis.Z);
-		double maxX = x + shape.max(Axis.X);
-		double maxZ = z + shape.max(Axis.Z);
+		double minZ = Math.max(z + shape.min(Axis.Z), entityLocalZ - radius);
+		double maxX = Math.min(x + shape.max(Axis.X), entityLocalX + radius);
+		double maxZ = Math.min(z + shape.max(Axis.Z), entityLocalZ + radius);
+		if (minX >= maxX || minZ >= maxZ) {
+			return;
+		}
 
 		var instance = instances.get();
 		instance.x = (float) minX;
 		instance.y = (float) minY;
 		instance.z = (float) minZ;
-		instance.entityX = entityX - renderOrigin.getX();
-		instance.entityZ = entityZ - renderOrigin.getZ();
+		instance.entityX = (float) entityLocalX;
+		instance.entityZ = (float) entityLocalZ;
 		instance.sizeX = (float) (maxX - minX);
 		instance.sizeZ = (float) (maxZ - minZ);
 		instance.alpha = alpha;
diff --git a/common/src/lib/resources/assets/flywheel/flywheel/instance/shadow.vert b/common/src/lib/resources/assets/flywheel/flywheel/instance/shadow.vert
index 97649f6249..99d99e47b7 100644
--- a/common/src/lib/resources/assets/flywheel/flywheel/instance/shadow.vert
+++ b/common/src/lib/resources/assets/flywheel/flywheel/instance/shadow.vert
@@ -1,10 +1,11 @@
+// Vanilla reference: net.minecraft.client.renderer.feature.ShadowFeatureRenderer#renderTranslucent
 void flw_instanceVertex(in FlwInstance i) {
     // Stretch the quad to the shape of the block the shadow is being cast on,
     // then move it to the correct position.
     flw_vertexPos.xyz = flw_vertexPos.xyz * vec3(i.size.x, 1., i.size.y) + i.pos;
 
     // Uvs are calculated based on the distance to the entity.
-    flw_vertexTexCoord = (flw_vertexPos.xz - i.entityPosXZ) * 0.5 / i.radius + 0.5;
+    flw_vertexTexCoord = (i.entityPosXZ - flw_vertexPos.xz) * 0.5 / i.radius + 0.5;
 
     flw_vertexColor.a = i.alpha;
 }
diff --git a/vanillin/common/src/main/java/dev/engine_room/vanillin/elements/ShadowElement.java b/vanillin/common/src/main/java/dev/engine_room/vanillin/elements/ShadowElement.java
index 9bf9fafbb7..f53601a56f 100644
--- a/vanillin/common/src/main/java/dev/engine_room/vanillin/elements/ShadowElement.java
+++ b/vanillin/common/src/main/java/dev/engine_room/vanillin/elements/ShadowElement.java
@@ -19,6 +19,7 @@
 import dev.engine_room.flywheel.lib.visual.AbstractVisual;
 import dev.engine_room.flywheel.lib.visual.SimpleDynamicVisual;
 import dev.engine_room.flywheel.lib.visual.util.InstanceRecycler;
+import dev.engine_room.flywheel.lib.util.ShadersModHelper;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.Lightmap;
 import net.minecraft.client.renderer.texture.OverlayTexture;
@@ -55,6 +56,7 @@ public final class ShadowElement extends AbstractVisual implements SimpleDynamic
 	private static final Model SHADOW_MODEL = new SingleMeshModel(ShadowMesh.INSTANCE, SHADOW_MATERIAL);
 
 	private final Entity entity;
+	private final boolean shaderPackShadowSuppressed;
 	private final BlockPos.MutableBlockPos pos = new BlockPos.MutableBlockPos();
 
 	private final InstanceRecycler<ShadowInstance> instances = new InstanceRecycler<>(this::createInstance);
@@ -66,6 +68,7 @@ public final class ShadowElement extends AbstractVisual implements SimpleDynamic
 	public ShadowElement(VisualizationContext ctx, Entity entity, float partialTick, Config config) {
 		super(ctx, entity.level(), partialTick);
 		this.entity = entity;
+		shaderPackShadowSuppressed = ShadersModHelper.isShaderPackInUse();
 		radius(config.radius);
 		strength(config.strength);
 	}
@@ -118,7 +121,7 @@ public void beginFrame(DynamicVisual.Context context) {
 
 		boolean shadowsEnabled = Minecraft.getInstance().options.entityShadows()
 				.get();
-		if (shadowsEnabled && radius > 0 && !entity.isInvisible()) {
+		if (shadowsEnabled && !shaderPackShadowSuppressed && radius > 0 && !entity.isInvisible()) {
 			setupInstances(context);
 		}
 
@@ -181,18 +184,25 @@ private void setupInstance(ChunkAccess chunk, MutableBlockPos pos, double entity
 		int y = pos.getY() - renderOrigin.getY() + 1; // +1 since we moved the pos down.
 		int z = pos.getZ() - renderOrigin.getZ();
 
-		double minX = x + shape.min(Axis.X);
+		double entityLocalX = entityX - renderOrigin.getX();
+		double entityLocalZ = entityZ - renderOrigin.getZ();
+		// Do not submit a whole block for a small-radius shadow; clipping here keeps the
+		// primitive and its UV domain bounded by the same radius.
+		double minX = Math.max(x + shape.min(Axis.X), entityLocalX - radius);
 		double minY = y + shape.min(Axis.Y);
-		double minZ = z + shape.min(Axis.Z);
-		double maxX = x + shape.max(Axis.X);
-		double maxZ = z + shape.max(Axis.Z);
+		double minZ = Math.max(z + shape.min(Axis.Z), entityLocalZ - radius);
+		double maxX = Math.min(x + shape.max(Axis.X), entityLocalX + radius);
+		double maxZ = Math.min(z + shape.max(Axis.Z), entityLocalZ + radius);
+		if (minX >= maxX || minZ >= maxZ) {
+			return;
+		}
 
 		var instance = instances.get();
 		instance.x = (float) minX;
 		instance.y = (float) minY;
 		instance.z = (float) minZ;
-		instance.entityX = (float) (entityX - renderOrigin.getX());
-		instance.entityZ = (float) (entityZ - renderOrigin.getZ());
+		instance.entityX = (float) entityLocalX;
+		instance.entityZ = (float) entityLocalZ;
 		instance.sizeX = (float) (maxX - minX);
 		instance.sizeZ = (float) (maxZ - minZ);
 		instance.alpha = alpha;