engine/demo: load roughness texture for cube

engine/BUILD

@@ -8,6 +8,7 @@ rust_binary(
         "-C", "opt-level=3",
         "-C", "overflow-checks=n",
         "-C", "force-frame-pointers=y",
+        "-C", "lto=off",
     ],
     srcs = [
         "src/main.rs",
@@ -58,6 +59,7 @@ rust_binary(
         "//engine/shaders:forward_vert",
         "//engine/shaders:forward_frag",
         "//assets:test-128px.png",
+        "//assets:test-128px-roughness.png",
     ],
 )
 
@@ -69,6 +71,7 @@ pkg_tar(
         "//engine/shaders:forward_vert",
         "//engine/shaders:forward_frag",
         "//assets:test-128px.png",
+        "//assets:test-128px-roughness.png",
     ],
     strip_prefix = '/',
     package_dir = 'demo',

engine/src/main.rs

@@ -103,7 +103,7 @@ impl Main {
 
         let material = renderer.add_resource(PBRMaterialBuilder {
             diffuse: Texture::from_image(String::from("assets/test-128px.png")),
-            roughness: Texture::from_color(color::LinearF32::new(1.0)),
+            roughness: Texture::from_image(String::from("assets/test-128px-roughness.png")),
         }.build());
 
         for x in -20..20 {