Use tall destination preview volume

src/main/java/net/dnorberg/rivencraft/client/preview/PonderDestinationPreviewRenderer.java

@@ -43,7 +43,7 @@ public final class PonderDestinationPreviewRenderer implements DestinationPrevie
     public PonderDestinationPreviewRenderer() {
         Minecraft minecraft = Minecraft.getInstance();
         previewLevel = new PonderLevel(BlockPos.ZERO, minecraft.level);
-        selection = SelectionImpl.of(new BoundingBox(0, 0, 0, 16, 6, 16));
+        selection = SelectionImpl.of(new BoundingBox(0, 0, 0, 8, 127, 8));
         section = new WorldSectionElementImpl(selection);
     }
 
@@ -105,10 +105,10 @@ public final class PonderDestinationPreviewRenderer implements DestinationPrevie
         poseStack.mulPose(Axis.XP.rotationDegrees(-28.0F));
         poseStack.mulPose(Axis.YP.rotationDegrees((ticks + partialTick) * 0.6F));
         UIRenderHelper.flipForGuiRender(poseStack);
-        // A 17×17 footprint has a 24-block diagonal. This scale fits that
-        // diagonal in the panel, including at the 45° points of the orbit.
-        poseStack.scale(4.6F, 4.6F, 4.6F);
-        poseStack.translate(-8.5F, -1.5F, -8.5F);
+        // Fit the complete 128-block vertical slice, while keeping the 9×9
+        // footprint centered during the full horizontal orbit.
+        poseStack.scale(0.58F, 0.58F, 0.58F);
+        poseStack.translate(-4.5F, -64.0F, -4.5F);
 
         SuperRenderTypeBuffer buffer = DefaultSuperRenderTypeBuffer.getInstance();
         section.renderFirst(previewLevel, buffer, graphics, partialTick);

src/main/java/net/dnorberg/rivencraft/network/LinkPreviewPayload.java

@@ -12,8 +12,8 @@ import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.block.state.BlockState;
 
 public record LinkPreviewPayload(int skyColor, List<SnapshotBlock> blocks) implements CustomPacketPayload {
-    /** A square footprint keeps every side of the scene available during a full orbit. */
-    private static final int MAX_BLOCKS = 17 * 7 * 17;
+    /** A square footprint keeps every side visible during an orbit, with a tall vertical slice. */
+    private static final int MAX_BLOCKS = 9 * 128 * 9;
     public static final Type<LinkPreviewPayload> TYPE = new Type<>(
             ResourceLocation.fromNamespaceAndPath(Rivencraft.MOD_ID, "link_preview")
     );

src/main/java/net/dnorberg/rivencraft/network/ModNetworking.java

@@ -114,12 +114,12 @@ public final class ModNetworking {
 
         BlockPos origin = target.location().pos();
         List<LinkPreviewPayload.SnapshotBlock> blocks = new ArrayList<>();
-        // The preview rotates through a complete orbit. Use the same radius on
-        // both horizontal axes so no side falls outside the snapshot at 90°.
-        for (BlockPos pos : BlockPos.betweenClosed(origin.offset(-8, -2, -8), origin.offset(8, 4, 8))) {
+        // The square footprint survives every angle of the orbit. The vertical
+        // slice captures 64 blocks below through 63 blocks above the link point.
+        for (BlockPos pos : BlockPos.betweenClosed(origin.offset(-4, -64, -4), origin.offset(4, 63, 4))) {
             var state = level.getBlockState(pos);
             if (!state.isAir()) {
-                blocks.add(new LinkPreviewPayload.SnapshotBlock(pos.subtract(origin).offset(8, 2, 8), state));
+                blocks.add(new LinkPreviewPayload.SnapshotBlock(pos.subtract(origin).offset(4, 64, 4), state));
             }
         }
         int skyColor = level.getBiome(origin).value().getSkyColor();