diff --git a/src/AcDream.App/Rendering/Sky/SkyRenderer.cs b/src/AcDream.App/Rendering/Sky/SkyRenderer.cs
index 86c8d7f..48ac917 100644
--- a/src/AcDream.App/Rendering/Sky/SkyRenderer.cs
+++ b/src/AcDream.App/Rendering/Sky/SkyRenderer.cs
@@ -221,6 +221,23 @@ public sealed unsafe class SkyRenderer : IDisposable
                 uint tex = _textures.GetOrUpload(sub.SurfaceId);
                 _gl.ActiveTexture(TextureUnit.Texture0);
                 _gl.BindTexture(TextureTarget.Texture2D, tex);
+
+                // Sky meshes need per-object wrap mode. The dome is 5 flat
+                // walls meeting at edges — under GL_REPEAT any UV drift
+                // past [0,1] wraps to the opposite edge of the texture,
+                // drawing a visible line along each wall seam. Static
+                // sky GfxObjs (dome, sun, moon, stars) should use
+                // CLAMP_TO_EDGE to avoid that bleed. Scrolling cloud
+                // layers (TexVelocity != 0) still need REPEAT so the
+                // animated UV offset wraps correctly. Detection heuristic:
+                // non-zero TexVelocity on either axis ⇒ scrolling layer.
+                bool scrolling = obj.TexVelocityX != 0f || obj.TexVelocityY != 0f;
+                int wrapMode = scrolling
+                    ? (int)TextureWrapMode.Repeat
+                    : (int)TextureWrapMode.ClampToEdge;
+                _gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, wrapMode);
+                _gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, wrapMode);
+
                 _gl.BindVertexArray(sub.Vao);
                 _gl.DrawElements(PrimitiveType.Triangles,
                     (uint)sub.IndexCount,