PNG-8 Transparency

[MasterKaos]

Ok it is a known fact that IE5 (and above?) can't handle transparency in PNG-24 - the transparent area shows up as grey in colour.

I have had no trouble however with files i have saved as PNG-8 in Photoshop, then set a colour as transparent using image functions in PHP (server side scripting language).

However now i have come to a situation where i would like to use the feature of PNG that allows for several shades of transparency. Does PNG-8 offer this or is it only available in PNG-24?

If it is supported in PNG-8, how can i export a PSD image on a transparent backgound to a PNG-8 with multiple shades of transparency (for anti aliasing to work)?

The only way i know of exporting transparency in Photoshop is using the Export Transparent Image Wizard in "Help... Export Transparent Image". But the ETI wizard does not ask me if i want to save in PNG-8 or PNG-24 and it defaults to PNG-24.

Otherwise, if only one shade of transparency is available in PNG-8, are there any tricks for preserving anti-aliasing on images with a transparent background?

I am using Photoshop 7

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The first 90% of the code accounts for the first 90% of the development time. The remaining 10% of the code accounts for the other 90% of the development time.

 

[MasterKaos]

Hmmm not getting any responses, so I'll rephrase the question - perhaps it was too long:

Does PNG-8 support multiple shades of transparency?

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The first 90% of the code accounts for the first 90% of the development time. The remaining 10% of the code accounts for the other 90% of the development time.

 

[barehug]

No, PNG-8 works much like a GIF(binary transparency), but ususlly smaller(though sometimes for very simple images with regular patterns I've found GIFs are still smaller).

Use the 'save for web' feature for exporting web images.


Moe: It could have been a real ugly situation, but luckily I managed to shoot him in the spine.

 

[EicherDesignDotCom]

Yep, PNG-8 is just like a GIF when it comes to transparency.

And barehug is correct, if you File\Save for Web... then you can select PNG-8/PNG-24/GIF/JPEG/WBMP and choose the transparency option or not. You can also optomize the file in this dialog box.

Good luck.