5 files changed, 10 insertions, 10 deletions
diff --git a/scene/3d/baked_lightmap.cpp b/scene/3d/baked_lightmap.cpp
index b70e6dbc5d..4b1eccb40d 100644
--- a/scene/3d/baked_lightmap.cpp
+++ b/scene/3d/baked_lightmap.cpp
@@ -88,7 +88,7 @@ float BakedLightmapData::get_energy() const {
 
 void BakedLightmapData::add_user(const NodePath &p_path, const Ref<Texture> &p_lightmap, int p_instance) {
 
-	ERR_FAIL_COND(p_lightmap.is_null());
+	ERR_FAIL_COND_MSG(p_lightmap.is_null(), "It's not a reference to a valid Texture object.");
 	User user;
 	user.path = p_path;
 	user.lightmap = p_lightmap;
@@ -360,7 +360,7 @@ BakedLightmap::BakeError BakedLightmap::bake(Node *p_from_node, bool p_create_vi
 		//check for valid save path
 		DirAccessRef d = DirAccess::open(save_path);
 		if (!d) {
-			ERR_PRINTS("Invalid Save Path: " + save_path);
+			ERR_PRINTS("Invalid Save Path '" + save_path + "'.");
 			return BAKE_ERROR_NO_SAVE_PATH;
 		}
 	}
diff --git a/scene/3d/cpu_particles.cpp b/scene/3d/cpu_particles.cpp
index 4cb94225b4..93ff60bc4e 100644
--- a/scene/3d/cpu_particles.cpp
+++ b/scene/3d/cpu_particles.cpp
@@ -53,7 +53,7 @@ void CPUParticles::set_emitting(bool p_emitting) {
 
 void CPUParticles::set_amount(int p_amount) {
 
-	ERR_FAIL_COND(p_amount < 1);
+	ERR_FAIL_COND_MSG(p_amount < 1, "Amount of particles must be greater than 0.");
 
 	particles.resize(p_amount);
 	{
@@ -71,7 +71,7 @@ void CPUParticles::set_amount(int p_amount) {
 }
 void CPUParticles::set_lifetime(float p_lifetime) {
 
-	ERR_FAIL_COND(p_lifetime <= 0);
+	ERR_FAIL_COND_MSG(p_lifetime <= 0, "Particles lifetime must be greater than 0.");
 	lifetime = p_lifetime;
 }
 
@@ -1193,7 +1193,7 @@ void CPUParticles::_notification(int p_what) {
 void CPUParticles::convert_from_particles(Node *p_particles) {
 
 	Particles *particles = Object::cast_to<Particles>(p_particles);
-	ERR_FAIL_COND(!particles);
+	ERR_FAIL_COND_MSG(!particles, "Only Particles nodes can be converted to CPUParticles.");
 
 	set_emitting(particles->is_emitting());
 	set_amount(particles->get_amount());
diff --git a/scene/3d/navigation.cpp b/scene/3d/navigation.cpp
index 12d562c0c6..ba0460d47c 100644
--- a/scene/3d/navigation.cpp
+++ b/scene/3d/navigation.cpp
@@ -230,7 +230,7 @@ void Navigation::navmesh_set_transform(int p_id, const Transform &p_xform) {
 }
 void Navigation::navmesh_remove(int p_id) {
 
-	ERR_FAIL_COND(!navmesh_map.has(p_id));
+	ERR_FAIL_COND_MSG(!navmesh_map.has(p_id), "Trying to remove nonexisting navmesh with id: " + itos(p_id));
 	_navmesh_unlink(p_id);
 	navmesh_map.erase(p_id);
 }
diff --git a/scene/3d/particles.cpp b/scene/3d/particles.cpp
index a6ccdb5791..241eb7d1ca 100644
--- a/scene/3d/particles.cpp
+++ b/scene/3d/particles.cpp
@@ -57,13 +57,13 @@ void Particles::set_emitting(bool p_emitting) {
 
 void Particles::set_amount(int p_amount) {
 
-	ERR_FAIL_COND(p_amount < 1);
+	ERR_FAIL_COND_MSG(p_amount < 1, "Amount of particles cannot be smaller than 1.");
 	amount = p_amount;
 	VS::get_singleton()->particles_set_amount(particles, amount);
 }
 void Particles::set_lifetime(float p_lifetime) {
 
-	ERR_FAIL_COND(p_lifetime <= 0);
+	ERR_FAIL_COND_MSG(p_lifetime <= 0, "Particles lifetime must be greater than 0.");
 	lifetime = p_lifetime;
 	VS::get_singleton()->particles_set_lifetime(particles, lifetime);
 }
diff --git a/scene/3d/physics_body.cpp b/scene/3d/physics_body.cpp
index 71040d2d68..a02cc4bee6 100644
--- a/scene/3d/physics_body.cpp
+++ b/scene/3d/physics_body.cpp
@@ -188,7 +188,7 @@ void StaticBody::set_friction(real_t p_friction) {
 
 	WARN_DEPRECATED_MSG("The method set_friction has been deprecated and will be removed in the future, use physics material instead.");
 
-	ERR_FAIL_COND(p_friction < 0 || p_friction > 1);
+	ERR_FAIL_COND_MSG(p_friction < 0 || p_friction > 1, "Friction must be between 0 and 1.");
 
 	if (physics_material_override.is_null()) {
 		physics_material_override.instance();
@@ -216,7 +216,7 @@ void StaticBody::set_bounce(real_t p_bounce) {
 
 	WARN_DEPRECATED_MSG("The method set_bounce has been deprecated and will be removed in the future, use physics material instead.");
 
-	ERR_FAIL_COND(p_bounce < 0 || p_bounce > 1);
+	ERR_FAIL_COND_MSG(p_bounce < 0 || p_bounce > 1, "Bounce must be between 0 and 1.");
 
 	if (physics_material_override.is_null()) {
 		physics_material_override.instance();