fix(renderer): transparency color + handle anchors not rendering

assets/shaders/phong.fs

@@ -73,7 +73,7 @@ void main() {
     }
     
     vec4 studPx = texture(studs, vec3(vTexCoords, vSurfaceZ));
-    FragColor = vec4(mix(result, vec3(studPx), studPx.w), 1-transparency);
+    FragColor = vec4(mix(result, vec3(studPx), studPx.w), 1) * (1-transparency);
 }
 
 vec3 calculateDirectionalLight(DirLight light) {

core/src/rendering/renderer.cpp

@@ -233,6 +233,8 @@ void renderHandles() {
     }
 
     // 2d square overlay
+    glDisable(GL_CULL_FACE);
+
     identityShader->use();
     identityShader->set("aColor", glm::vec3(0.f, 1.f, 1.f));