IBLPrefilterContext creates and initializes GPU state common to all environment map filters supported. Typically, only one instance per filament Engine of this object needs to exist. Java usage example: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ context = new IBLPrefilterContext(engine); equirectangularToCubemap = new IBLPrefilterContext.EquirectangularToCubemap(context); Texture equirect = HDRLoader.createTexture("foo.hdr"); Texture skyboxTexture = equirectangularToCubemap.run(equirect); engine.destroy(equirect); equirectangularToCubemap.destroy(); specularFilter = new IBLPrefilterContext.SpecularFilter(context); Texture reflections = specularFilter.run(skyboxTexture); specularFilter.destroy(); context.destroy(); IndirectLight ibl = IndirectLight.Builder() .reflections(reflections) .intensity(30000.0f) .build(engine); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~