message: color smoothing param tweaks
  reduce sample stride to avoid artefacts
  min color grid resolution for better smoothing at high mesh resolution
diff: @@ -20,7 +20,7 @@ export const ColorSmoothingParams = {
  auto: PD.Group({}),
  on: PD.Group({
  resolutionFactor: PD.Numeric(2, { min: 1, max: 6, step: 0.1 }),
  - sampleStride: PD.Numeric(6, { min: 1, max: 12, step: 1 }),
  + sampleStride: PD.Numeric(3, { min: 1, max: 12, step: 1 }),
  }),
  off: PD.Group({})
  }),
  @@ -29,14 +29,14 @@ export type ColorSmoothingParams = typeof ColorSmoothingParams
  export function getColorSmoothingProps(props: PD.Values<ColorSmoothingParams>, theme: Theme, resolution?: number, webgl?: WebGLContext) {
  if ((props.smoothColors.name === 'on' || (props.smoothColors.name === 'auto' && theme.color.preferSmoothing)) && resolution && resolution < 3 && webgl) {
  - let stride = 6;
  + let stride = 3;
  if (props.smoothColors.name === 'on') {
  resolution *= props.smoothColors.params.resolutionFactor;
  stride = props.smoothColors.params.sampleStride;
  } else {
  // https://graphtoy.com/?f1(x,t)=(2-smoothstep(0,1.1,x))*x&coords=0.7,0.6,1.8
  resolution *= 2 - smoothstep(0, 1.1, resolution);
  - if (resolution > 0.8) stride = 3;
  + resolution = Math.max(0.5, resolution);
  }
  return { resolution, stride, webgl };
  };
  