Rendering Video Texture

[davidAnPrintell]

Hey!
I face some kind of issue while experimenting with image targets for my company.

I'm not exactly sure if thats an issue or just a misunderstanding by my side, so im creating this discussion.

Issue description

The video texture renders too bright while shading is set to unlit. Neither the material.postLightingColor attribute nor material.emissive has any effect on this.
If I increase the postlightingColor the videotexture only gets brighter( of course).
I guess this has to do with the "general colorgrading"?

Steps to reproduce the issue

1. Start sample image tracking project
2. Change "matrix video"
3. Track Image

What's the expected result?

What's the actual result?

Additional code details

Material :

 MaterialBuilder materialBuilder = new MaterialBuilder()
                .platform(MaterialBuilder.Platform.MOBILE)
                .name("External Video Material")
                .require(MaterialBuilder.VertexAttribute.UV0)
                .shading(MaterialBuilder.Shading.UNLIT)
                .doubleSided(true)
                .samplerParameter(MaterialBuilder.SamplerType.SAMPLER_EXTERNAL, MaterialBuilder.SamplerFormat.FLOAT, MaterialBuilder.ParameterPrecision.DEFAULT, "videoTexture")
                .optimization(MaterialBuilder.Optimization.NONE);

        MaterialPackage plainVideoMaterialPackage = materialBuilder
                .blending(MaterialBuilder.BlendingMode.OPAQUE)
                .material("void material(inout MaterialInputs material) {\n" +
                        "    prepareMaterial(material);\n" +
                        "    material.baseColor = texture(materialParams_videoTexture, getUV0()).rgba;\n" +
                        "    material.postLightingColor = float4(0.0);\n" +
                        "    material.emissive = float4(0.0, 0.0, 0.0, 1.0);\n" +
                        "}\n")
                .build(filamentEngine);

Configs

  config.updateMode = Config.UpdateMode.LATEST_CAMERA_IMAGE
                    config.focusMode = Config.FocusMode.AUTO
                    config.planeFindingMode = Config.PlaneFindingMode.DISABLED
                    config.augmentedImageDatabase = imageDatabase
                    config.lightEstimationMode = Config.LightEstimationMode.DISABLED
                    session.configure(config)
                    arSceneView?.lightEstimationConfig = LightEstimationConfig.DISABLED
                    arSceneView?.renderer!!.filamentView.colorGrading = ColorGrading.Builder().toneMapping(ColorGrading.ToneMapping.FILMIC)
                        .build(EngineInstance.getEngine().filamentEngine)
                    arSceneView?.setSession(session)

[grassydragon]

Hi!
If you think that it is related to tone mapping, you can cancel the effect of tone mapping using the inverseTonemap function: https://google.github.io/filament/Materials.html#materialdefinitions/shaderpublicapis/fragmentonly

material.baseColor.rgb = inverseTonemap(material.baseColor.rgb)

[davidAnPrintell]

Thanks for your reply. It fixed the problem immediately