Some refinements. Cloud block items now float on other cloud blocks

src/main/java/com/minelittlepony/unicopia/EquineContext.java

@@ -21,6 +21,10 @@ public interface EquineContext {
         return 0;
     }
 
+    default boolean collidesWithClouds() {
+        return getCompositeRace().any(Race::canInteractWithClouds);
+    }
+
     static EquineContext of(ShapeContext context) {
         if (context == ShapeContext.absent()) {
             return Unicopia.SIDE.getPony().map(EquineContext.class::cast).orElse(ABSENT);

src/main/java/com/minelittlepony/unicopia/UTags.java

@@ -26,6 +26,7 @@ public interface UTags {
     TagKey<Item> CHANGELING_EDIBLE = item("food_types/changeling_edible");
     TagKey<Item> SPOOKED_MOB_DROPS = item("spooked_mob_drops");
     TagKey<Item> IS_DELIVERED_AGGRESSIVELY = item("is_delivered_aggressively");
+    TagKey<Item> FLOATS_ON_CLOUDS = item("floats_on_clouds");
 
     TagKey<Item> POLEARMS = item("polearms");
     TagKey<Item> APPLE_SEEDS = item("apple_seeds");

src/main/java/com/minelittlepony/unicopia/block/cloud/CloudBlock.java

@@ -3,7 +3,6 @@ package com.minelittlepony.unicopia.block.cloud;
 import org.jetbrains.annotations.Nullable;
 
 import com.minelittlepony.unicopia.EquineContext;
-import com.minelittlepony.unicopia.Race;
 import com.minelittlepony.unicopia.entity.player.Pony;
 
 import net.minecraft.block.Block;
@@ -176,7 +175,7 @@ public class CloudBlock extends Block {
     }
 
     protected boolean canInteract(BlockState state, BlockView world, BlockPos pos, EquineContext context) {
-        return context.getCompositeRace().any(Race::canInteractWithClouds);
+        return context.collidesWithClouds();
     }
 
     @SuppressWarnings("deprecation")

src/main/java/com/minelittlepony/unicopia/entity/ItemImpl.java

@@ -154,6 +154,11 @@ public class ItemImpl implements Equine<ItemEntity> {
         entity.getDataTracker().set(ITEM_RACE, Race.REGISTRY.getId(race).toString());
     }
 
+    @Override
+    public boolean collidesWithClouds() {
+        return entity.getStack().isIn(UTags.FLOATS_ON_CLOUDS) || getSpecies().canInteractWithClouds();
+    }
+
     @Override
     public void toNBT(NbtCompound compound) {
         compound.putString("owner_race", Race.REGISTRY.getId(getSpecies()).toString());

src/main/java/com/minelittlepony/unicopia/entity/mob/AirBalloonEntity.java

@@ -458,9 +458,15 @@ public class AirBalloonEntity extends MobEntity implements EntityCollisions.Comp
 
     @Override
     public Race getSpecies() {
-        return isAirworthy() && !isAscending() ? Race.PEGASUS : Race.UNSET;
+        return Race.UNSET;
     }
 
+    @Override
+    public boolean collidesWithClouds() {
+        return isAirworthy() && !isAscending();
+    }
+
+
     @Override
     public float getCloudWalkingStrength() {
         return isAirworthy() ? 2 : 0;

src/main/java/com/minelittlepony/unicopia/mixin/MixinEntityShapeContext.java

@@ -39,4 +39,9 @@ abstract class MixinEntityShapeContext implements EquineContext {
     public float getCloudWalkingStrength() {
         return equineContext.getCloudWalkingStrength();
     }
+
+    @Override
+    public boolean collidesWithClouds() {
+        return equineContext.collidesWithClouds();
+    }
 }

src/main/resources/data/unicopia/tags/blocks/clouds.json

@@ -5,6 +5,7 @@
     "unicopia:cloud_planks",
     "unicopia:dense_cloud",
     "unicopia:compacted_cloud",
+    "unicopia:compacted_cloud_planks",
     "unicopia:unstable_cloud",
     "unicopia:soggy_cloud"
   ]

src/main/resources/data/unicopia/tags/items/cloud_beds.json

@@ -0,0 +1,6 @@
+{
+  "replace": false,
+  "values": [
+    "unicopia:cloud_bed"
+  ]
+}

src/main/resources/data/unicopia/tags/items/cloud_slabs.json

@@ -0,0 +1,8 @@
+{
+  "replace": false,
+  "values": [
+    "unicopia:cloud_slab",
+    "unicopia:dense_cloud_slab",
+    "unicopia:cloud_planks_slab"
+  ]
+}

src/main/resources/data/unicopia/tags/items/cloud_stairs.json

@@ -0,0 +1,8 @@
+{
+  "replace": false,
+  "values": [
+    "unicopia:cloud_stairs",
+    "unicopia:dense_cloud_stairs",
+    "unicopia:cloud_planks_stairs"
+  ]
+}

src/main/resources/data/unicopia/tags/items/clouds.json

@@ -0,0 +1,9 @@
+{
+  "replace": false,
+  "values": [
+    "unicopia:cloud",
+    "unicopia:cloud_planks",
+    "unicopia:dense_cloud",
+    "unicopia:unstable_cloud"
+  ]
+}

src/main/resources/data/unicopia/tags/items/groups/pegasus.json

@@ -4,8 +4,12 @@
     "unicopia:cloud",
     "unicopia:cloud_slab",
     "unicopia:cloud_stairs",
+    "unicopia:cloud_planks",
+    "unicopia:cloud_planks_slab",
+    "unicopia:cloud_planks_stairs",
     "unicopia:dense_cloud",
     "unicopia:dense_cloud_slab",
+    "unicopia:dense_cloud_stairs",
     "unicopia:unstable_cloud",
     "unicopia:cloud_pillar",
     "#unicopia:food_types/raw_fish",