Mushroom groves: unclaimable moss where giant mushrooms grow slowly and glow when ready to fell

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/gfx.rs

@@ -93,6 +93,7 @@ pub const I_RAM: u32 = 209; // battering ram tool
 pub const I_CATAPULT: u32 = 210; // catapult tool
 pub const T_SNOW: u32 = 211; // 4 variants: snow on the land above ground (winter)
 pub const T_PUMPKIN: u32 = 215; // a carved pumpkin (Halloween)
+pub const T_MOSS: u32 = 216; // 4 variants: mushroom grove ground, moss with glowing spores
 
 pub struct Gfx {
     pub atlas: Texture2D,
@@ -943,6 +944,22 @@ fn gen_atlas() -> Image {
             Some(if r % 11 == 0 { c(176, 200, 96) } else if r % 6 == 0 { c(112, 150, 62) } else if r % 23 == 0 { c(236, 220, 110) } else if r % 37 == 0 { c(230, 236, 240) } else { c(140, 176, 78) })
         });
     }
+    // mushroom grove: dark stones overgrown with teal moss, a few glowing spores
+    for v in 0..4u32 {
+        cv.cell(T_MOSS + v, |x, y| {
+            let r = hash(x, y, 520 + v);
+            let moss = (hash(x / 3, y / 3, 530 + v) % 5) < 3;
+            Some(if r % 41 == 0 {
+                c(150, 255, 220) // a spore glows
+            } else if r % 29 == 0 {
+                c(200, 150, 255)
+            } else if moss {
+                if r % 4 == 0 { c(46, 112, 96) } else if r % 3 == 0 { c(30, 84, 74) } else { c(38, 98, 84) }
+            } else {
+                stones(x, y, v, (52, 58, 56), (26, 30, 30), 8)
+            })
+        });
+    }
     // obsidian: cooled lava, dark glass with a few glowing seams
     for v in 0..4u32 {
         cv.cell(T_OBSIDIAN + v, |x, y| {
@@ -2159,6 +2176,7 @@ impl Gfx {
             Kind::Obsidian => T_OBSIDIAN + v,
             Kind::Mushroom => T_FLOOR + v,
             Kind::Tree => T_GRASS + v,
+            Kind::Grove => T_MOSS + v,
             Kind::LavaBridge => T_STONEBRIDGE + (v & 1),
             Kind::Shard => T_HEROFLOOR + v,
             Kind::Aerie => T_AERIE + v,