fix: uv map flipY and triplanar world space, add deployment guide

src/materials/TriplanarMaterial.ts

@@ -43,8 +43,8 @@ export class TriplanarMaterial extends THREE.MeshPhysicalMaterial {
         `#include <worldpos_vertex>`,
         `
         #include <worldpos_vertex>
-        vTriplanarPosition = position; // Object space
-        vTriplanarNormal = normal; // Object space normal
+        vTriplanarPosition = worldPosition.xyz; // World space
+        vTriplanarNormal = normalize((modelMatrix * vec4(normal, 0.0)).xyz); // World space normal
         `
       );