Hello,

POV-Ray 3.7.0 64bit, Windows 8.1

I noticed that if a material has SSLT enabled and its pigment has a 
strong gradient, such as a dark line or black area the anti-aliasing 
breaks at the edge of the two colors. This is more noticeable if the 
image is high resolution.

See images below. The scene is a mesh sphere with an image map pigment. 
It was rendered with radiosity, anti-aliasing (+am2 +a0.01 +r3). The 
SSLT mm per units is 24.5.

no SSLT:
http://imgur.com/t2Oqqhm
Notice the anti-aliased transition between the colors on the sphere.

With SSLT (marble):
http://imgur.com/MoGWfDq
The edges between the colors are strongly aliased. Almost looks as if AA 
is switched off but the edge of the sphere shows that AA is active.

This happens with any AA and SSLT setting I use. Also image 
interpolation does not eliminate this effect. Only way to avoid it is 
not using SSLT.

You can download the scene, with SSLT enabled, from this Google drive link:
https://drive.google.com/file/d/0B0MYeki9vLYYRGtVRnZOZ0NMMG8/edit?usp=sharing

file->download to get the entire archive.



FlyerX

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