During the rendering of this image I got several "Illegal grid value in
dda_traversal()".
What's wrong? Is that connected with my hf bricks? How can I fix it?
Besides I'd like to know the best way to make realistic bricks
(displaced isosurfaces?...).
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Preview of image 'wall.jpg'
![wall.jpg](/povray.binaries.images/attachment/%3C3A7860E0.A8B21A52%40libero.it%3E/wall.jpg?preview=1)
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