[osg-users] Can I make a png image's background transparent?

Lv Qing

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Mar 12, 2013, 9:15:03 AM3/12/13

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Hi,

... I have attached one png image to the placenode,however the image has a white background ,is it possible to make the backgound transparent?

Thank you!

Cheers,
Lv

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Robert Osfield

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Mar 12, 2013, 10:14:07 AM3/12/13

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Hi Lv,

On 12 March 2013 13:15, Lv Qing <donl...@msn.com> wrote:
> ... I have attached one png image to the placenode,however the image has a white background ,is it possible to make the backgound transparent?

What do you mean by transparent in this context? Do you want an alpha
blended object overlaying other objects in your scene or could you
even mean something OS specific like having a window blend with the
desktop?

Robert.

Terry Welsh

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Mar 12, 2013, 11:59:19 AM3/12/13

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I do not see the attachment. However, the PNG format can store
4-channel images (RGB plus alpha). I make these all the time with
Gimp. You'll need to investigate how to create these with whatever
image manipulation program you are using.
--
Terry Welsh
www.reallyslick.com

> Message: 6
> Date: Tue, 12 Mar 2013 14:15:03 +0100
> From: "Lv Qing" <donl...@msn.com>
> To: osg-...@lists.openscenegraph.org
> Subject: [osg-users] Can I make a png image's background transparent?
> Message-ID: <1363094103...@forum.openscenegraph.org>
> Content-Type: text/plain; charset=UTF-8
>
> Hi,

>
> ... I have attached one png image to the placenode,however the image has a white background ,is it possible to make the backgound transparent?
>
>

> Thank you!
>
> Cheers,
> Lv