dist/claygl.es.js
function () {
        if (this._clearStack.length > 0) {
            var opt = this._clearStack.pop();
            this.clearColor = opt.clearColor;
            this.clearBit = opt.clearBit;
        }
    }
function () {
        if (this._clearStack.length > 0) {
            var opt = this._clearStack.pop();
            this.clearColor = opt.clearColor;
            this.clearBit = opt.clearBit;
        }
    }
function ( ) { if ( this . _clearStack . length > 0 ) { var opt = this . _clearStack . pop ( ) ; this . clearColor = opt . clearColor ; this . clearBit = opt . clearBit ; } }
Pop clear from stack, restore in the renderer
Pop clear from stack restore in the renderer