ue: fluid.densityDissipation,
                        callback: value => {
                            fluid.densityDissipation = value;
                        }
                    },
                    {
                        type: 'slider',
                        name: 'Velocity',
                        min: 0,
                        max: 1,
                        step: 0.01,
                        value: fluid.velocityDissipation,
                        callback: value => {
                   