Mgfractal: Improve spawning behaviour

Spawn player 1 node higher to avoid spawning waist-deep in a possible
biome 'dust' node, such as tundra snowblock.
Tune default offset to spawn players in a more interesting location on the
mandelbrot sets, on a raised area that looks like a spawn platform.
Tune julia parameters to help avoid spawn search failing, especially for
fractal 6.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/mapgen_fractal.cpp b/src/mapgen_fractal.cpp
index 13da2f180..720408dbb 100644
--- a/src/mapgen_fractal.cpp
+++ b/src/mapgen_fractal.cpp
@@ -156,7 +156,8 @@ int MapgenFractal::getSpawnLevelAtPoint(v2s16 p)
 			air_count = 0;
 		} else if (solid_below) {  // Air above solid node
 			air_count++;
-			if (air_count == 2)
+			// 3 to account for snowblock dust
+			if (air_count == 3)
 				return y - 2;
 		}
 	}