[]修改了Scene下的WebGL参数导致渲染3D对象出现局部透明

/**

     * Renders the quad

     */

    render() {

        this.gl.useProgram(this.program);

        this.gl.bindBuffer(Laya.WebGLContext.ARRAY_BUFFER, this.vertexPositionBuffer);

        this.gl.enableVertexAttribArray(this.vertexPositionAttribute);

        this.gl.vertexAttribPointer(

            this.vertexPositionAttribute,

            this.vertexPositionBuffer.itemSize,

            Laya.WebGLContext.FLOAT,

            false,

            0,

            0

        );



        this.gl.bindBuffer(Laya.WebGLContext.ARRAY_BUFFER, this.textureCoordBuffer);



        // Check the current orientation of the device combined with the

        // orientation of the VRSeeThroughCamera to determine the correct UV

        // coordinates to be used.

        const combinedOrientation = combineOrientations(

            window.screen.orientation.angle,

            this.passThroughCamera.orientation

        );

        if (combinedOrientation !== this.combinedOrientation) {

            this.combinedOrientation = combinedOrientation;

            this.gl.bufferData(

                Laya.WebGLContext.ARRAY_BUFFER,

                this.f32TextureCoords[this.combinedOrientation],

                Laya.WebGLContext.STATIC_DRAW

            );

        }



        this.gl.enableVertexAttribArray(this.textureCoordAttribute);

        this.gl.vertexAttribPointer(

            this.textureCoordAttribute,

            this.textureCoordBuffer.itemSize,

            Laya.WebGLContext.FLOAT,

            false,

            0,

            0

        );



        this.gl.activeTexture(this.gl.TEXTURE0);

        this.gl.bindTexture(Laya.WebGLContext.TEXTURE_EXTERNAL_OES, this.texture);

        // Update the content of the texture in every frame.

        this.gl.texImage2D(

            Laya.WebGLContext.TEXTURE_EXTERNAL_OES,

            0,

            Laya.WebGLContext.RGB,

            Laya.WebGLContext.RGB,

            Laya.WebGLContext.UNSIGNED_BYTE,

            this.passThroughCamera

        );

        this.gl.uniform1i(this.samplerUniform, 0);

        this.gl.bindBuffer(Laya.WebGLContext.ELEMENT_ARRAY_BUFFER, this.indexBuffer);

        this.gl.drawElements(

            Laya.WebGLContext.TRIANGLES,

            this.indexBuffer.numItems,

            Laya.WebGLContext.UNSIGNED_SHORT,

            0

        );

    }