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++ // Copyright (C) 2026 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
++
++ // CullMode override in SubRenderPass with AugmentMaterial.
++ // The augment shader outputs opaque white regardless of the base material color.
++ // Phase 1 (useFrontCulling=false): Back culling -> white rectangle visible at center.
++ // Phase 2 (useFrontCulling=true): Front culling override -> rectangle culled -> black center.
++
++ import QtQuick
++ import QtQuick3D
++ import QtQuick3D.Helpers
++
++ Rectangle {
++ id: root
++ width: 400
++ height: 400
++ color: "black"
++
++ property bool useFrontCulling: false
++
++ View3D {
++ anchors.fill: parent
++ renderOverrides: View3D.DisableInternalPasses
++
++ camera: cam
++
++ PerspectiveCamera {
++ id: cam
++ position: Qt.vector3d(0, 0, 600)
++ }
++
++ RenderPassTexture {
++ id: colorBuffer
++ format: RenderPassTexture.RGBA16F
++ }
++
++ RenderPass {
++ id: mainPass
++ clearColor: Qt.rgba(0, 0, 0, 1)
++ commands: [
++ ColorAttachment { target: colorBuffer },
++ DepthStencilAttachment {},
++ RenderablesFilter { renderableTypes: RenderablesFilter.None },
++ SubRenderPass {
++ renderPass: RenderPass {
++ materialMode: RenderPass.AugmentMaterial
++ augmentShader: "cull_override_augment.glsl"
++ commands: [
++ PipelineStateOverride {
++ objectName: "pso"
++ cullMode: root.useFrontCulling ? PipelineStateOverride.Front
++ : PipelineStateOverride.Back
++ }
++ ]
++ }
++ }
++ ]
++ }
++
++ SimpleQuadRenderer {
++ texture: Texture {
++ textureProvider: RenderOutputProvider {
++ textureSource: RenderOutputProvider.UserPassTexture
++ renderPass: mainPass
++ }
++ }
++ }
++
++ Model {
++ source: "#Rectangle"
++ scale: Qt.vector3d(5, 5, 5)
++ materials: PrincipledMaterial {
++ baseColor: "blue"
++ lighting: PrincipledMaterial.NoLighting
++ }
++ }
++ }
++ }