createMatOfDisney 修复解析材质参数错误

src/utils/MatHelper.php

@@ -84,6 +84,7 @@ class MatHelper{
             $metalnessTexture = new ImageMap(
                 ['file' => $metalnessTextureSavaPath]
             );
+            $metalnessTexture->gamma = 1;
             $metalnessTexture->mapping = $mapping;
             $scene->registerTexture($metalnessTexture);
             $material->setMetallic($metalnessTexture);
@@ -95,6 +96,7 @@ class MatHelper{
             $roughnessTexture = new ImageMap(
                 ['file' => $roughnessTextureSavaPath]
             );
+            $roughnessTexture->gamma = 1;
             $roughnessTexture->mapping = $mapping;
             $scene->registerTexture($roughnessTexture);
             $material->setRoughness($roughnessTexture);
@@ -108,6 +110,7 @@ class MatHelper{
             $bumpTexture = new ImageMap(
                 ['file' => $textureSavaPath]
             );
+            $bumpTexture->gamma = 1;
             $bumpTexture->mapping = $mapping;
             $scene->registerTexture($bumpTexture);