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++ // Copyright (C) 2026 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
++
++ // Test for QTBUG-145057: PrincipledMaterial with a normalMap, alphaMode=Mask,
++ // OpaquePrePassDepthDraw, shadows, and IBL — switching to DebugSettings.Normals
++ // caused a shader compile crash ('qt_tangent' undeclared identifier).
++ // The Normal debug mode only set needsWorldNormal, but normal map sampling also
++ // requires tangent/binormal for the TBN matrix.
++
++ import QtQuick
++ import QtQuick3D
++ import QtQuick3D.Helpers
++
++ Rectangle {
++ width: 400
++ height: 400
++ color: "black"
++
++ View3D {
++ anchors.fill: parent
++ renderMode: View3D.Offscreen
++
++ environment: SceneEnvironment {
++ backgroundMode: SceneEnvironment.SkyBox
++ lightProbe: Texture {
++ textureData: ProceduralSkyTextureData {}
++ }
++ debugSettings: DebugSettings {
++ materialOverride: DebugSettings.Normals
++ }
++ }
++
++ DirectionalLight {
++ brightness: 1.5
++ eulerRotation.x: -40
++ eulerRotation.y: 45
++ castsShadow: true
++ }
++
++ camera: PerspectiveCamera {
++ id: camera
++ z: 350
++ }
++
++ Texture {
++ id: normalTex
++ source: "../shared/maps/RibsNormal.png"
++ }
++
++ Texture {
++ id: baseTex
++ source: "../shared/maps/oulu_2.jpeg"
++ }
++
++ // PrincipledMaterial with normalMap + alphaMode=Mask + OpaquePrePassDepthDraw:
++ // the exact combination that triggered QTBUG-145057 when debug Normals was active.
++ Model {
++ source: "#Sphere"
++ position: Qt.vector3d(-100, 0, 0)
++ scale: Qt.vector3d(0.8, 0.8, 0.8)
++ materials: PrincipledMaterial {
++ baseColorMap: baseTex
++ normalMap: normalTex
++ roughness: 0.8
++ alphaMode: PrincipledMaterial.Mask
++ depthDrawMode: PrincipledMaterial.OpaquePrePassDepthDraw
++ }
++ }
++
++ // Control: same setup without a normal map
++ Model {
++ source: "#Sphere"
++ position: Qt.vector3d(100, 0, 0)
++ scale: Qt.vector3d(0.8, 0.8, 0.8)
++ materials: PrincipledMaterial {
++ baseColorMap: baseTex
++ roughness: 0.8
++ alphaMode: PrincipledMaterial.Mask
++ depthDrawMode: PrincipledMaterial.OpaquePrePassDepthDraw
++ }
++ }
++ }
++ }