finished the heightmap converter
converts between .txt and .png depending on what you give it
can't post executables on the forums (badspot is against it, for good reason), so
attached is the source code (rename HeightMaps.java.txt to HeightMaps.java)
compile using "javac HeightMaps.java" (you need the
java development kit (JDK)) or use an online compiler like
compilejava.netrun using "java HeightMaps" to print usage information
to convert heightA.png to heightA.txt and heightB.txt to heightB.png, use "java HeightMaps heightA.png heightB.txt"
will have to look into using a singular modter brick per chunk, instead of a 2x2 of bricks
I seem to remember that there were some situations where 1 modter brick wouldn't fit well, so I went with 2x2 instead and that fixed the border issue (but flattens out the terrain and makes weird slopes)