release/scripts/startup/bl_ui/properties_render.py

@@ -469,6 +469,11 @@ class RENDER_PT_eevee_next_shadows(RenderButtonsPanel, Panel):
     def poll(cls, context):
         return (context.engine in cls.COMPAT_ENGINES)
 
+    def draw_header(self, context):
+        scene = context.scene
+        props = scene.eevee
+        self.layout.prop(props, "use_shadows", text="")
+
     def draw(self, context):
         layout = self.layout
         layout.use_property_split = True

source/blender/blenloader/intern/versioning_300.cc

@@ -3913,6 +3913,7 @@ void blo_do_versions_300(FileData *fd, Library * /*lib*/, Main *bmain)
   {
     if (!DNA_struct_elem_find(fd->filesdna, "SceneEEVEE", "int", "shadow_pool_size")) {
       LISTBASE_FOREACH (Scene *, scene, &bmain->scenes) {
+        scene->eevee.flag |= SCE_EEVEE_SHADOW_ENABLED;
         scene->eevee.shadow_pool_size = 512;
         scene->r.simplify_shadows = 1.0f;
         scene->r.simplify_shadows_render = 1.0f;

source/blender/draw/engines/eevee_next/eevee_shadow.cc

@@ -632,8 +632,18 @@ ShadowModule::ShadowModule(Instance &inst) : inst_(inst)
 void ShadowModule::init()
 {
   ::Scene &scene = *inst_.scene;
-  shadow_page_len_ = clamp_i(
-      scene.eevee.shadow_pool_size * 4, SHADOW_PAGE_PER_ROW, SHADOW_MAX_PAGE);
+  bool enabled = (scene.eevee.flag & SCE_EEVEE_SHADOW_ENABLED) != 0;
+  if (assign_if_different(enabled_, enabled)) {
+    inst_.sampling.reset();
+    /* Force light reset. */
+    for (Light &light : inst_.lights.light_map_.values()) {
+      light.initialized = false;
+    }
+  }
+
+  int pool_size = enabled_ ? scene.eevee.shadow_pool_size : 0;
+  shadow_page_len_ = clamp_i(pool_size * 4, SHADOW_PAGE_PER_ROW, SHADOW_MAX_PAGE);
+
   float simplify_shadows = 1.0f;
   if (scene.r.mode & R_SIMPLIFY) {
     simplify_shadows = inst_.is_viewport() ? scene.r.simplify_shadows :
@@ -670,7 +680,7 @@ void ShadowModule::init()
     statistics_buf_.current().read();
     ShadowStatistics stats = statistics_buf_.current();
 
-    if (stats.page_used_count > shadow_page_len_) {
+    if (stats.page_used_count > shadow_page_len_ && enabled_) {
       std::stringstream ss;
       ss << "Error: Shadow buffer full, may result in missing shadows and lower performance. ("
          << stats.page_used_count << " / " << shadow_page_len_ << ")\n";
@@ -761,7 +771,7 @@ void ShadowModule::end_sync()
 {
   /* Delete unused shadows first to release tilemaps that could be reused for new lights. */
   for (Light &light : inst_.lights.light_map_.values()) {
-    if (!light.used) {
+    if (!light.used || !enabled_) {
       light.shadow_discard_safe(*this);
     }
     else if (light.directional != nullptr) {

source/blender/draw/engines/eevee_next/eevee_shadow.hh

@@ -281,6 +281,8 @@ class ShadowModule {
   float lod_bias_ = 0.0f;
   /** Maximum number of allocated pages. Maximum value is SHADOW_MAX_TILEMAP. */
   int shadow_page_len_ = SHADOW_MAX_TILEMAP;
+  /** Global switch. */
+  bool enabled_ = true;
 
  public:
   ShadowModule(Instance &inst);

source/blender/makesdna/DNA_scene_types.h

@@ -2706,6 +2706,7 @@ enum {
   SCE_EEVEE_OVERSCAN = (1 << 21),
   SCE_EEVEE_DOF_HQ_SLIGHT_FOCUS = (1 << 22),
   SCE_EEVEE_DOF_JITTER = (1 << 23),
+  SCE_EEVEE_SHADOW_ENABLED = (1 << 24),
 };
 
 /** #SceneEEVEE.shadow_method */

source/blender/makesrna/intern/rna_scene.c

@@ -7757,6 +7757,12 @@ static void rna_def_scene_eevee(BlenderRNA *brna)
   RNA_def_property_update(prop, NC_SCENE | ND_RENDER_OPTIONS, NULL);
 
   /* Shadows */
+  prop = RNA_def_property(srna, "use_shadows", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_sdna(prop, NULL, "flag", SCE_EEVEE_SHADOW_ENABLED);
+  RNA_def_property_ui_text(prop, "Shadows", "Enable shadow casting from lights");
+  RNA_def_property_override_flag(prop, PROPOVERRIDE_OVERRIDABLE_LIBRARY);
+  RNA_def_property_update(prop, NC_SCENE | ND_RENDER_OPTIONS, NULL);
+
   prop = RNA_def_property(srna, "shadow_cube_size", PROP_ENUM, PROP_NONE);
   RNA_def_property_enum_items(prop, eevee_shadow_size_items);
   RNA_def_property_ui_text(