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How do I export transparent png Background images

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How do I export transparent png Background images JulesW 12/29/09 4:29 AM
Hello
 
I have started to use SketchUp to create image sprites for my Game. But I have soon come up with a fundamental problem, in that it is not obvious how to set the Background to Transparent in png  2D image exports.  How do I set the Background to Transparent ?  - The only Background style option is to use Colours, e.g. White, which then appears when I display in other Applications.  So I cannot use this.
 
Surely this is a common problem /request ?
I have sen other posts regarding using Photoshop to converting Green background to Transparent, but I don't have that package, and not an expert in PhotoShop.
 
SketchUp version: Basic
Operating system: Windows
Re: How do I export transparent png Background images Gaieus 12/29/09 6:13 AM
Hi Jules,

The Mac version of SU can export images with transparent background only.

If you had the Pro version of SU, you could also use LayOut (an additional program for the Pro) where you can do that.

So in your case, only image editing remains. However you don't need PhotoShop for this neither to be an expert. Use Paint.NET - and it is very easy. The areas you delete will become transparent. You can use its "magic wand" to quickly select any colour and hit the Del button.

Just make sure to save the png file with 32 bit setting to keep its transparency (it will prompt you upon saving)
Re: How do I export transparent png Background images JulesW 12/29/09 8:39 AM
Gaieus
 
Excellent, I have just downloaded and started using Paint.NET.  Its really straightforward to use, and I can remove the background really weasy, just as you suggested.
 
Many Many Thanks for this.
 
Jules
Re: How do I export transparent png Background images Gaieus 12/29/09 8:44 AM
You welcome. Glad you like it - I use it myself as the "default image editor" set in Window > Preferences > Applications for SU.
I also have Gimp - which is more like PhotoShop and needs more expertise as well - so I only play with it when some special tasks are needed.

Note that you can add plugins to Paint.NET (as well as Gimp - which is also free).
Re: How do I export transparent png Background images RoomClearer 3/28/11 6:02 PM
Hello,

Curious,  exported png image from Mac version with transparent yet there is still a background?
Re: How do I export transparent png Background images Gaieus 3/29/11 1:17 AM
I am not a Mac user but you may need to disable ground and sky in your styles > Background settings and set the background to 100% white.

At least this is how it only works on Windows with the LayOut workaround. And in fact, now as you bumped the topic, there has been a new plugin for those puny Windows users to do the export straight from SU so SU Free users can now also do it - see below - but it needs these settings.

Again, I am not a Mac user so I cannot advise for sure. Also, are you trying to export png files? You need an image format that supports transparency.
Re: How do I export transparent png Background images Irshad321 6/23/11 7:37 AM
Hey I have similar problem in Sketch Up 8. I am trying to import png image with transparent background. But when I render it using VRay it doesn't show transparent area.. rather a color in a background.
Re: How do I export transparent png Background images Gaieus 6/23/11 11:05 AM
Well, that's a completely different issue. Lucky you however (though I do not use V-ray), I think in V-ray you need to use a clipmap. This is a black and white (not greyscale) image where the background is black and what is supposed to be visible of an image is white.

See an example with some grass material and its corresponding clipmap in the Podium forums:
http://supodiumforum.websitetoolbox.com/post/show_single_post?pid=23352813&postcount=21
Re: How do I export transparent png Background images woldas 11/11/11 6:43 AM
About V-Ray:
You need to check the "use colourtexture for transparency" in Diffuse layer in Material Editor