Add vertical shadows back in, dim them when close to the ground.

rt64/config/texture_mods.json

@@ -1146,6 +1146,24 @@
             "materialMod": null,
             "name": "textures/segment2/segment2.13C58.rgba16"
         },
+        {
+            "materialMod": {
+                "depthBias": 25.0,
+                "lightGroupMaskBits": 0,
+                "shadowAlphaMultiplier": 0.0,
+                "solidAlphaMultiplier": 0.8
+            },
+            "name": "textures/segment2/shadow_quarter_circle.ia8"
+        },
+        {
+            "materialMod": {
+                "depthBias": 5.0,
+                "lightGroupMaskBits": 0,
+                "shadowAlphaMultiplier": 0.0,
+                "solidAlphaMultiplier": 0.5
+            },
+            "name": "textures/segment2/shadow_quarter_square.ia8"
+        },
         {
             "materialMod": null,
             "name": "textures/sky/rr_textures.00000.rgba16"

src/game/rendering_graph_node.c

@@ -696,7 +696,6 @@ void geo_set_animation_globals(struct GraphNodeObject_sub *node, s32 hasAnimatio
  * the floor below it.
  */
 static void geo_process_shadow(struct GraphNodeShadow *node) {
-#ifndef GFX_DISABLE_SHADOWS
     Gfx *shadowList;
     Mat4 mtxf;
     Vec3f shadowPos;
@@ -774,7 +773,6 @@ static void geo_process_shadow(struct GraphNodeShadow *node) {
             gMatStackIndex--;
         }
     }
-#endif
 
     if (node->node.children != NULL) {
         geo_process_node_and_siblings(node->node.children);

src/game/shadow.c

@@ -240,6 +240,13 @@ s8 init_shadow(struct Shadow *s, f32 xPos, f32 yPos, f32 zPos, s16 shadowScale,
         s->solidity = dim_shadow_with_distance(overwriteSolidity, yPos - s->floorHeight);
     }
 
+#ifdef GFX_DIM_SHADOWS_CLOSE_TO_GROUND
+    const f32 blendOff = 100.0f;
+    const f32 blendDist = 200.0f; 
+    int newSolidity = s->solidity * ((yPos - s->floorHeight - blendOff) / blendDist);
+    s->solidity = min(max(newSolidity, 0), s->solidity);
+#endif
+
     s->shadowScale = scale_shadow_with_distance(shadowScale, yPos - s->floorHeight);
 
     s->floorDownwardAngle = atan2_deg(s->floorNormalZ, s->floorNormalX);

src/pc/gfx/gfx_rendering_api_config.h

@@ -3,7 +3,7 @@
 
 #ifdef RAPI_RT64
 #   define GFX_MAX_BUFFERED                 16384
-#   define GFX_DISABLE_SHADOWS
+#   define GFX_DIM_SHADOWS_CLOSE_TO_GROUND
 #   define GFX_DISABLE_FRUSTUM_CULLING
 #   define GFX_DISABLE_LIGHTING
 #   define GFX_FLUSH_ON_ENDDL