superset2/superset/assets/visualizations/deckgl/layers/screengrid.jsx

import { ScreenGridLayer } from 'deck.gl';

export default function getLayer(formData, payload) {
  const fd = formData;
  const c = fd.color_picker;
  const data = payload.data.features.map(d => ({
    ...d,
    color: [c.r, c.g, c.b, 255 * c.a],
  }));

  // Passing a layer creator function instead of a layer since the
  // layer needs to be regenerated at each render
  return new ScreenGridLayer({
    id: `screengrid-layer-${fd.slice_id}`,
    data,
    pickable: true,
    cellSizePixels: fd.grid_size,
    minColor: [c.r, c.g, c.b, 0],
    maxColor: [c.r, c.g, c.b, 255 * c.a],
    outline: false,
    getWeight: d => d.weight || 0,
  });
}