Drawing maps of small cave passages
Program Therion was originaly developed to generate map and atlas of big cave passages. Some point and area (sand, debris, rock) symbols used for big caves are too large for maps of small passages or the density of area symbols are not satisfactory. The simple guide how to solve this problem follows.
Modifications of symbols, arrays and lines
In this section I'll not describe how to make the modifications. You'll find here the modificated definitions of symbols instead. To find explanations read the chapter: Modification of symbols - how to