Turning on point cloud attenuation blows up safari 11.1.1

[euwest]

Looks like adding tileset.pointCloudShading.attenuation = true results in:

DeveloperError: The color texture pixel datatype is FLOAT and the WebGL implementation does not support the EXT_color_buffer_float or WEBGL_color_buffer_float extensions. See Context.colorBufferFloat. (source?)

system specs:

Easily duplicated in sandcastle, which appears to be using 1.47. I've also tried 1.46.1 and had the same issue.

[hpinkos]

@likangning93 any ideas here? Is this something that's not supported and we need a flag for or is this a bug?

[likangning93]

I'll take a deeper look soon. It's definitely weird that this is happening when applying point cloud attenuation on a non-point-cloud tileset though.

[likangning93]

From a quick look though, this might just be an extension that we need to check for.
[EDIT] we might be able to get around needing color_buffer_float, which could end up making EDL also more efficient.