修改了Scene下的WebGL参数导致渲染3D对象出现局部透明

大饼干

因为项目需要对场景的webgl做修改在背景渲染层上加一个摄像头数据，然后我修改后就出现了上述问题一下是截屏，（webgl我也不是很熟悉，望大佬帮我指正一下）

我仔细发现感觉那一块透明的就是这个物体的轮廓，但是不知道为什么会有这种情况，下面是代码

望大佬帮我指点下感谢

大饼干

[code]/**

     * 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
        );
    }[/code]这是Render部分的代码