Improvement to light blending (can mix sunlight to transparent and luminous tile), failed attempt to perturb terrain, need better algorithm

Former-commit-id: a8b456401859802fe5d19b7d12a41033f2ed3e44
Former-commit-id: 4f4a976e6f295f45519744216704c864afb6d621

work_files/Tools/img_12bit_raw.py

@@ -0,0 +1,21 @@
+# usage: pypy scriptname inputfile outputfile
+
+import sys
+
+
+def bandlimit(i):
+	key = (i & 0xF0) >> 4
+	return (key << 4) | key
+
+
+outcontents = []
+
+infile = open(sys.argv[1], "rb").read()
+
+for i in infile:
+	#print(ord(i))
+	outcontents.append(bandlimit(ord(i)))
+
+outfile = open(sys.argv[2], "wb")
+outfile.write(bytearray(outcontents))
+outfile.close()