Fix walkway and wall trims; not sure why shore frills don't also work

osx/tools/mask.vert

@@ -0,0 +1,10 @@
+
+uniform mat4 trans;
+
+void main() {
+    // transform the vertex position
+    gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
+	
+    // transform the texture coordinates
+    gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
+}