image layer with transparent color

[json87]

thanks for providing the excellent tool. Recently, I used it to load a local image, and found that the white background is also shown. Thus, is there any layer attribution to set transparent color.

[OmarShehata]

Can you show how you're loading this image? Transparency should work fine if you're loading in a PNG. Here's a Sandcastle I just tried. You can see the transparency in the Cesium logo renders correctly as an imagery layer.

[GatorScott]

I don't know of any way to say that "white" should be treated as transparent. The image must contain an alpha/transparency channel.

[hpinkos]

@json87 Yes, I think this is a problem with your image. There's nothing in CesiumJS to specify a nodata color. If this image is a png and you're using the SingleTileImageryProvider, make sure the PNG image has those areas transparent instead of white. Formats like jpg don't have an alpha channel, so you may need to convert it to a different format. If you need more help with this, try posting a question on the forum: https://groups.google.com/forum/?hl=en#!forum/cesium-dev
A lot more users see the forum, so it's more likely that someone else has encountered a similar problem and may be able to help. Thanks!