Second Life Forums Archive - Issue with quality when resizing images

Lexe Luik

Registered User

Join date: 5 Aug 2008

Posts: 8

12-26-2008 07:36

Hi , I am trying to scan some of my old RL photos to put up in my SL home but when I scan them at 600dpi and try to reduce the size of them to all have 1500 pixel Width using Image Size in Photoshop , the quality reduces substantially and the pixels start to become really jagged.
How can I make the images smaller but still retain the quality when I zoom in on them?
Thank you for any help you can offer.

Lee Ponzu

What Would Steve Do?

Join date: 28 Jun 2006

Posts: 1,770

12-26-2008 09:20

First, lower resolution means lower quality. Not much you can do.

When you resize, be sure that Anti-aliasing is turned on. Also, you have options with what rescaling algorithm you use. Try different ones.

_____________________

So many monkeys, so little Shakespeare.

Chosen Few

Alpha Channel Slave

Join date: 16 Jan 2004

Posts: 7,496

12-26-2008 09:27

The first thing to understand is that numbers like 1500 have no place in SL. Like most 3D applications, SL requires that textures be measurable in powers of two. The largest size SL allows is 1024x1024. If you don't start out with a proper size, SL will resize the image upon upload, and the results won't always be pretty. See the sticky on texture sizes at the top of this forum for more information.

As for why your images are losing quality when you downsize, what resampling method are you using? (Edit -> Preferences -> General -> Image Interpolation) For downsizing photographs, I'd suggest Bicubic or Bicubic Sharper, but try experimenting with all, and see what gives you the best result for each image.

_____________________

.

Land now available for rent in Indigo. Low rates. Quiet, low-lag mainland sim with good neighbors. IM me in-world if you're interested.

Ceera Murakami

Texture Artist / Builder

Join date: 9 Sep 2005

Posts: 7,750

12-26-2008 09:29

Regardless of the resolution of your source image, you're not going to import a texture as a single image with more than 1024 pixels in either direction. SL just does not handle images more detailed than that.

Read this article :
/109/e6/150360/1.html

It explains SL texture constraints in detail. How many pixels in each direction work, and lots more.

_____________________

Sorry, LL won't let me tell you where I sell my textures and where I offer my services as a sim builder. Ask me in-world.

Issue with quality when resizing images
Lexe Luik Registered User Join date: 5 Aug 2008 Posts: 8	12-26-2008 07:36 Hi , I am trying to scan some of my old RL photos to put up in my SL home but when I scan them at 600dpi and try to reduce the size of them to all have 1500 pixel Width using Image Size in Photoshop , the quality reduces substantially and the pixels start to become really jagged. How can I make the images smaller but still retain the quality when I zoom in on them? Thank you for any help you can offer.
Lee Ponzu What Would Steve Do? Join date: 28 Jun 2006 Posts: 1,770	12-26-2008 09:20 First, lower resolution means lower quality. Not much you can do. When you resize, be sure that Anti-aliasing is turned on. Also, you have options with what rescaling algorithm you use. Try different ones. _____________________ So many monkeys, so little Shakespeare.
Chosen Few Alpha Channel Slave Join date: 16 Jan 2004 Posts: 7,496	12-26-2008 09:27 The first thing to understand is that numbers like 1500 have no place in SL. Like most 3D applications, SL requires that textures be measurable in powers of two. The largest size SL allows is 1024x1024. If you don't start out with a proper size, SL will resize the image upon upload, and the results won't always be pretty. See the sticky on texture sizes at the top of this forum for more information. As for why your images are losing quality when you downsize, what resampling method are you using? (Edit -> Preferences -> General -> Image Interpolation) For downsizing photographs, I'd suggest Bicubic or Bicubic Sharper, but try experimenting with all, and see what gives you the best result for each image. _____________________ . Land now available for rent in Indigo. Low rates. Quiet, low-lag mainland sim with good neighbors. IM me in-world if you're interested.
Ceera Murakami Texture Artist / Builder Join date: 9 Sep 2005 Posts: 7,750	12-26-2008 09:29 Regardless of the resolution of your source image, you're not going to import a texture as a single image with more than 1024 pixels in either direction. SL just does not handle images more detailed than that. Read this article : /109/e6/150360/1.html It explains SL texture constraints in detail. How many pixels in each direction work, and lots more. _____________________ Sorry, LL won't let me tell you where I sell my textures and where I offer my services as a sim builder. Ask me in-world.

Welcome to the Second Life Forums Archive

Issue with quality when resizing images