Pauli's software -> Terragen resources -> Tips and Tutorials -> Anti-aliasing   p.[1] [2] 18. 11. 2004  

Page 1: Anti-aliasing vs Resizing

In addition to the anti-aliasing options available on Terragen, an image can be anti-aliased by rendering in larger size and then resampling to target size with an image manipulation program.

On this page, different anti-aliasing methods are compared, in combination with different resampling ratios.
- The images in the first column were rendered without antialiasing.
- The images in second and third column were rendered with "fast" and "ultra" anti-aliasing methods, respectively.
- The images in the first row were rendered directly into the target size, 256x256 pixels.
- In the following rows, larger render sizes were used and then resampled with different resamping ratios. Both integer and non integer ratios were used for comparison.

The render time of each image is given in the "alt" text.  (On IE, hold cursor on the image to see the alt text).
Click "Normal size" link to see the images in actual size.  (This does not download new images, just zooms the existing ones.)

Normal size - Zoom 2x

  No anti-aliasing "Fast" anti-aliasing "Ultra" anti-aliasing
Rendered size
256 x 256
256x256 none, 10sek 256x256 Fast, 11sek 256x256 Ultra, 11sek
Rendered size
512 x 512
512x512 none, 34sek 512x512 Fast, 38sek 512x512 Ultra, 40sek
Rendered size
600 x 600
600x600 none, 45sek 600x600 Fast, 51sek 600x600 Ultra, 56sek
Rendered size
1024 x 1024
1024x1024 none, 2' 15sek 1024x1024 Fast, 2' 33sek 1024x1024 Ultra, 2' 49sek

As you can see, rendering at 2x size gives better quality than you can get with anti-aliasing in normal size. Using higher size increases the render time but does not give noticeably better results.

Next page: Resampling methods ->