Ensure reflection atlas is valid before rendering

drivers/gles3/storage/light_storage.cpp

@@ -811,6 +811,9 @@ bool LightStorage::reflection_probe_instance_begin_render(RID p_instance, RID p_
 
 	ERR_FAIL_NULL_V(atlas, false);
 
+	ERR_FAIL_COND_V_MSG(atlas->size < 4, false, "Attempted to render to a reflection atlas of invalid resolution.");
+	ERR_FAIL_COND_V_MSG(atlas->count < 1, false, "Attempted to render to a reflection atlas of size < 1.");
+
 	ReflectionProbeInstance *rpi = reflection_probe_instance_owner.get_or_null(p_instance);
 	ERR_FAIL_NULL_V(rpi, false);
 

servers/rendering/renderer_rd/storage_rd/light_storage.cpp

@@ -1482,6 +1482,9 @@ bool LightStorage::reflection_probe_instance_begin_render(RID p_instance, RID p_
 
 	ERR_FAIL_NULL_V(atlas, false);
 
+	ERR_FAIL_COND_V_MSG(atlas->size < 2, false, "Attempted to render to a reflection atlas of invalid resolution.");
+	ERR_FAIL_COND_V_MSG(atlas->count < 1, false, "Attempted to render to a reflection atlas of size < 1.");
+
 	ReflectionProbeInstance *rpi = reflection_probe_instance_owner.get_or_null(p_instance);
 	ERR_FAIL_NULL_V(rpi, false);
 

servers/rendering/rendering_server.cpp

@@ -3649,9 +3649,9 @@ void RenderingServer::init() {
 	GLOBAL_DEF_RST(PropertyInfo(Variant::INT, "rendering/reflections/sky_reflections/ggx_samples", PROPERTY_HINT_RANGE, "0,256,1"), 32);
 	GLOBAL_DEF(PropertyInfo(Variant::INT, "rendering/reflections/sky_reflections/ggx_samples.mobile", PROPERTY_HINT_RANGE, "0,128,1"), 16);
 	GLOBAL_DEF("rendering/reflections/sky_reflections/fast_filter_high_quality", false);
-	GLOBAL_DEF_RST(PropertyInfo(Variant::INT, "rendering/reflections/reflection_atlas/reflection_size", PROPERTY_HINT_RANGE, "0,4096,1"), 256);
-	GLOBAL_DEF(PropertyInfo(Variant::INT, "rendering/reflections/reflection_atlas/reflection_size.mobile", PROPERTY_HINT_RANGE, "0,2048,1"), 128);
-	GLOBAL_DEF(PropertyInfo(Variant::INT, "rendering/reflections/reflection_atlas/reflection_count", PROPERTY_HINT_RANGE, "0,256,1"), 64);
+	GLOBAL_DEF_RST(PropertyInfo(Variant::INT, "rendering/reflections/reflection_atlas/reflection_size", PROPERTY_HINT_RANGE, "4,4096,1"), 256);
+	GLOBAL_DEF(PropertyInfo(Variant::INT, "rendering/reflections/reflection_atlas/reflection_size.mobile", PROPERTY_HINT_RANGE, "4,2048,1"), 128);
+	GLOBAL_DEF(PropertyInfo(Variant::INT, "rendering/reflections/reflection_atlas/reflection_count", PROPERTY_HINT_RANGE, "1,256,1"), 64);
 	GLOBAL_DEF_RST("rendering/reflections/specular_occlusion/enabled", true);
 
 	GLOBAL_DEF("rendering/global_illumination/gi/use_half_resolution", false);