From 6c2152045a651ec3ed483240ebab64cfbce1beb0 Mon Sep 17 00:00:00 2001
From: Andreas Schmitt <info@vacuumbreather.de>
Date: Thu, 17 Jun 2021 07:56:51 +0200
Subject: [PATCH] Fix banding issue in artic tree range

Using tile index for randomization is a very very very bad idea
---
 src/tree_cmd.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/tree_cmd.cpp b/src/tree_cmd.cpp
index 7ae01c5dac..fd973bf40a 100644
--- a/src/tree_cmd.cpp
+++ b/src/tree_cmd.cpp
@@ -194,8 +194,7 @@ static TreeType GetRandomTreeType(TileIndex tile, uint seed)
 			uint normalised_distance = (height_above_snow_line < 0) ? -height_above_snow_line : height_above_snow_line + 1;
 			bool arctic_tree = false;
 			if (normalised_distance < lengthof(_arctic_tree_occurance)) {
-				uint adjusted_seed = (seed ^ tile) & 0xFF;
-				arctic_tree = adjusted_seed < _arctic_tree_occurance[normalised_distance];
+				arctic_tree = RandomRange(256) < _arctic_tree_occurance[normalised_distance];
 			}
 			if (height_above_snow_line < 0) {
 				/* Below snow level mixed forest. */