Add opacity effect to mapbox layers sourcetype "image"

[meteoDaniel]

Dear all would be great to have this feature.

I asked why it is not working in the plotly.py project: plotly/plotly.py#2077

import plotly.graph_objects as go

fig = go.Figure(go.Scattermapbox(), layout=dict(width=600, height=450))
mapbox = dict(zoom= 4.5,
              style='open-street-map',
              center=dict(
                        lat=42,
                        lon=-74.5),
              layers=[
                  dict(
                  below ='',
                      opacity=0.6,
                  source = "https://docs.mapbox.com/mapbox-gl-js/assets/radar.gif",
                  sourcetype= "image",
                  coordinates =  [
                          [-80.425, 46.437], [-71.516, 46.437], [-71.516, 37.936], [-80.425, 37.93]
                                 ])
                     ])
fig.update_layout(mapbox=mapbox)
fig.show()

[etpinard]

Thanks for reporting. I'll call this a bug as opacity is part of the mapbox layout layer attributes.

Fixing this bug should be as easy as adding 'raster-opacity': opts.opacity to

plotly.js/src/plots/mapbox/layers.js

Lines 248 to 250 in 8122c21

	Lib.extendFlat(paint, {
	'raster-fade-duration': 0
	});

similar to https://docs.mapbox.com/mapbox-gl-js/example/adjust-layer-opacity/

[meteoDaniel]

Thanks for this fast support guys !
@etpinard is this working with python right now? Or do i have to update the version?