Second Life Texture Upload Has Line Around It
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Eliminating "White Halos" in 2d Life
This page volition eventually be a discussion near the causes of the White Halo, and what can exist done virtually it. At the moment, since the site is still undergoing revision, it'southward just the onetime tutorial, transplanted without frames.
If you'd similar to see a movie of all of this in action, go to Easy Alpha Channels.
If y'all'd similar to come across a blow-past-accident explaining information technology all, keep reading.
Once again, a lesson on Alpha Channels in 2d Life. This is not a movie (notwithstanding), but is the method I currently use to make perfect Alphas with no trace of a white halo, and practiced, vibrant colors in semi-transparent areas. These instructions are for Photoshop CS2, but will work with all other versions of Photoshop as well. (Your interface might look unlike, but the things volition all exist in that location somewhere. Consult your manual or on-line help if you're having problem finding them.)
In this method, I use a free third party plug-in, available from Flaming Pear. Links are included in the text, or yous can just download it by clicking the link above. (Information technology'south in the Gratuitous Plugins pack, a chip more than than 2/3 of the mode down the folio.) They volition piece of work with any program that supports Photoshop plugins.
Also included in this tutorial is a set up of Photoshop Deportment that will automate the entire procedure for you. (A link is likewise provided inside the Tutorial.) I'm afraid that these volition only work if you accept Photoshop.
Permit'due south start.
In Second Life, we upload Targa (.tga) files to employ equally textures.
Targa files don't support layers; but they do support a single Alpha Channel, which shows as transparency in Second Life. Areas that are white in the Blastoff Channel are opaque in SL. Areas that are black are completely transparent. Areas that are shades of grayness are partially transparent, depending on how lite the shade.
This tutorial assumes that you are working with layers on a transparent groundwork. In other words, this will but work if you lot accept already extracted the prototype, and at that place is no background left. If you have a background, you need to extract the motion-picture show you want to bring into SL first.There are dozens of ways to do that, and I haven't written a tutoral about it notwithstanding. Please Search the web, using the keywords Extract Photoshop and Tutorial to find one.
Targa files that accept no Alpha Aqueduct are 24 bit files. (8 bits each for the Ruby-red, Light-green, and Blue channels. 8x3=24)
Targa files that have an alpha are 32 bits (8 bits more, for the additional channel. 8x4=32
In Adobe Photoshop, information technology'south very unproblematic to make the Alpha Channel. All you need to do is paint the paradigm you want, using transparency where y'all want it. Transparent areas volition evidence a checkerboard behind them. (You can alter the checkerboard in Preferences > Transparency & Gamut. Tap Command/ctrl K to open the Preferences dialog.)
You lot can edit Alpha Channels manually in Photoshop (although not in Photoshop Elements,) and you might want to practice that sometimes. But it's usually not necessary.
To create a perfect Alpha Channel, all you need to practice is:
one. Make a re-create of the file (and so y'all can continue your layered original.) Click the "Create New Document from Electric current State" button in the History Palette to do this.
two. Merge the Visible Layers (Shift Command/ctrl Eastward or employ the Layer Palette Bill of fare.) Obviously, if you only have a single layer in your certificate, y'all tin can skip this step.
3. Hold down Command/ctrl and click the thumbnail image in the Layers Palette to select the Pixels on that layer.
iv. Go to Select > Save Selection.
five. Select the defaults, and y'all have a perfect Alpha aqueduct, white where y'all had opacity, blackness where you had transparency, and grayness for partial transparency.
But, if you upload this image into SL, you'll notice what we call the dreaded White Halo. If you have semi-transparent areas, you'll also detect that they announced done out. The college the transparency, the lighter they will be.
Click here to go to the next page, and run into how to set up the problem.
Source: https://www.robinwood.com/Catalog/Technical/SL-Tuts/SLPages/WhiteHalo.html
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