diff --git a/server-rs/crates/api-server/src/tripo3d/pricing.rs b/server-rs/crates/api-server/src/tripo3d/pricing.rs
index 547e75708..aa37995a3 100644
--- a/server-rs/crates/api-server/src/tripo3d/pricing.rs
+++ b/server-rs/crates/api-server/src/tripo3d/pricing.rs
@@ -146,6 +146,8 @@ pub(crate) enum Model3dPricingError {
         model_version: Model3dModelVersion,
     },
     MissingAddOnPrice(Model3dAddOn),
+    /// `texture=false` 却带上贴图类加价项：组合自相矛盾，直接报错而不是照价收费。
+    InconsistentTextureAddOn(Model3dAddOn),
 }
 
 impl std::fmt::Display for Model3dPricingError {
@@ -164,6 +166,10 @@ impl std::fmt::Display for Model3dPricingError {
             Self::MissingAddOnPrice(add_on) => {
                 write!(f, "Tripo 3D 定价缺少 add-on：{add_on:?}")
             }
+            Self::InconsistentTextureAddOn(add_on) => write!(
+                f,
+                "Tripo 3D 定价组合不合法：texture=false 与贴图类 add-on {add_on:?} 冲突"
+            ),
         }
     }
 }
@@ -224,7 +230,18 @@ impl Model3dPricingConfig {
     }
 
     /// 查价：底价 + 命中的全部 add-on。缺键直接报错，不回退默认值。
+    ///
+    /// `texture=false` 与贴图类 add-on 同时出现属于自相矛盾的组合，这里失败关闭：
+    /// 生产构造点（[`model3d_add_ons`]）已把贴图类加价项挂在 `texture` 上，构造不出该状态。
     pub(crate) fn price(&self, query: &Model3dPricingQuery) -> Result<u32, Model3dPricingError> {
+        if !query.texture
+            && let Some(add_on) = query.add_ons.iter().find(|add_on| {
+                matches!(add_on, Model3dAddOn::HdTexture | Model3dAddOn::UltraTexture)
+            })
+        {
+            return Err(Model3dPricingError::InconsistentTextureAddOn(add_on));
+        }
+
         let base = self
             .base_prices
             .get(&query.endpoint)
@@ -345,6 +362,30 @@ mod tests {
         );
     }
 
+    #[test]
+    fn texture_add_ons_without_texture_are_rejected() {
+        let config = sample_config();
+        let inconsistent = Model3dAddOnSet {
+            hd_texture: true,
+            ..Model3dAddOnSet::default()
+        };
+
+        assert_eq!(
+            config.price(&text_query(false, inconsistent)),
+            Err(Model3dPricingError::InconsistentTextureAddOn(
+                Model3dAddOn::HdTexture
+            ))
+        );
+
+        // texture=true 时同一个 add-on 集合是合法组合，价格按底价 + 加价项计算。
+        assert_eq!(
+            config
+                .price(&text_query(true, inconsistent))
+                .expect("带贴图时贴图加价项合法"),
+            20 + 5
+        );
+    }
+
     #[test]
     fn texture_quality_only_charges_detailed_and_extreme() {
         for (quality, expected) in [