diff --git a/include/cglm/struct/cam.h b/include/cglm/struct/cam.h
index c2babb9..d3c35b0 100644
--- a/include/cglm/struct/cam.h
+++ b/include/cglm/struct/cam.h
@@ -273,22 +273,26 @@ glms_perspective(float fovy, float aspect, float nearZ, float farZ) {
 /*!
  * @brief extend perspective projection matrix's far distance
  *
+ * NOTE: if you dodn't want to create new matrix then use array api on struct.raw
+ *       like glm_persp_move_far(prooj.raw, deltaFar) to avoid create new mat4
+ *       each time
+ *
  * this function does not guarantee far >= near, be aware of that!
  *
  * @param[in, out] proj      projection matrix to extend
  * @param[in]      deltaFar  distance from existing far (negative to shink)
  */
 CGLM_INLINE
-void
+mat4s
 glms_persp_move_far(mat4s proj, float deltaFar) {
 #if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
-  glms_persp_move_far_lh_zo(proj, deltaFar);
+  return glms_persp_move_far_lh_zo(proj, deltaFar);
 #elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
-  glms_persp_move_far_lh_no(proj, deltaFar);
+  return glms_persp_move_far_lh_no(proj, deltaFar);
 #elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
-  glms_persp_move_far_rh_zo(proj, deltaFar);
+  return glms_persp_move_far_rh_zo(proj, deltaFar);
 #elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
-  glms_persp_move_far_rh_no(proj, deltaFar);
+  return glms_persp_move_far_rh_no(proj, deltaFar);
 #endif
 }
 
diff --git a/include/cglm/struct/clipspace/persp_lh_no.h b/include/cglm/struct/clipspace/persp_lh_no.h
index af957ad..42d325d 100644
--- a/include/cglm/struct/clipspace/persp_lh_no.h
+++ b/include/cglm/struct/clipspace/persp_lh_no.h
@@ -87,15 +87,22 @@ glms_perspective_lh_no(float fovy, float aspect, float nearZ, float farZ) {
  *        with a left-hand coordinate system and a
  *        clip-space of [-1, 1].
  *
+ * NOTE: if you dodn't want to create new matrix then use array api on struct.raw
+ *       like glms_persp_move_far_lh_no(prooj.raw, deltaFar) to avoid create new mat4
+ *       each time
+ *       
  * this function does not guarantee far >= near, be aware of that!
  *
  * @param[in, out] proj      projection matrix to extend
  * @param[in]      deltaFar  distance from existing far (negative to shink)
  */
 CGLM_INLINE
-void
+mat4s
 glms_persp_move_far_lh_no(mat4s proj, float deltaFar) {
-  glm_persp_move_far_lh_no(proj.raw, deltaFar);
+  mat4s dest;
+  dest = proj;
+  glm_persp_move_far_lh_no(dest.raw, deltaFar);
+  return dest;
 }
 
 /*!
diff --git a/include/cglm/struct/clipspace/persp_lh_zo.h b/include/cglm/struct/clipspace/persp_lh_zo.h
index e1ddacc..488a1e4 100644
--- a/include/cglm/struct/clipspace/persp_lh_zo.h
+++ b/include/cglm/struct/clipspace/persp_lh_zo.h
@@ -87,15 +87,22 @@ glms_perspective_lh_zo(float fovy, float aspect, float nearZ, float farZ) {
  *        with a left-hand coordinate system and a
  *        clip-space of [0, 1].
  *
+ * NOTE: if you dodn't want to create new matrix then use array api on struct.raw
+ *       like glms_persp_move_far_lh_zo(prooj.raw, deltaFar) to avoid create new mat4
+ *       each time
+ *
  * this function does not guarantee far >= near, be aware of that!
  *
  * @param[in, out] proj      projection matrix to extend
  * @param[in]      deltaFar  distance from existing far (negative to shink)
  */
 CGLM_INLINE
-void
+mat4s
 glms_persp_move_far_lh_zo(mat4s proj, float deltaFar) {
-  glm_persp_move_far_lh_zo(proj.raw, deltaFar);
+  mat4s dest;
+  dest = proj;
+  glm_persp_move_far_lh_zo(dest.raw, deltaFar);
+  return dest;
 }
 
 /*!
diff --git a/include/cglm/struct/clipspace/persp_rh_no.h b/include/cglm/struct/clipspace/persp_rh_no.h
index fbd6e6c..942b677 100644
--- a/include/cglm/struct/clipspace/persp_rh_no.h
+++ b/include/cglm/struct/clipspace/persp_rh_no.h
@@ -87,15 +87,22 @@ glms_perspective_rh_no(float fovy, float aspect, float nearZ, float farZ) {
  *        with a right-hand coordinate system and a
  *        clip-space of [-1, 1].
  *
+ * NOTE: if you dodn't want to create new matrix then use array api on struct.raw
+ *       like glms_persp_move_far_rh_no(prooj.raw, deltaFar) to avoid create new mat4
+ *       each time
+ *       s
  * this function does not guarantee far >= near, be aware of that!
  *
  * @param[in, out] proj      projection matrix to extend
  * @param[in]      deltaFar  distance from existing far (negative to shink)
  */
 CGLM_INLINE
-void
+mat4s
 glms_persp_move_far_rh_no(mat4s proj, float deltaFar) {
-  glm_persp_move_far_rh_no(proj.raw, deltaFar);
+  mat4s dest;
+  dest = proj;
+  glm_persp_move_far_rh_no(dest.raw, deltaFar);
+  return dest;
 }
 
 /*!
diff --git a/include/cglm/struct/clipspace/persp_rh_zo.h b/include/cglm/struct/clipspace/persp_rh_zo.h
index 596ffee..a00d9d7 100644
--- a/include/cglm/struct/clipspace/persp_rh_zo.h
+++ b/include/cglm/struct/clipspace/persp_rh_zo.h
@@ -87,15 +87,22 @@ glms_perspective_rh_zo(float fovy, float aspect, float nearZ, float farZ) {
  *        with a right-hand coordinate system and a
  *        clip-space of [0, 1].
  *
+ * NOTE: if you dodn't want to create new matrix then use array api on struct.raw
+ *       like glms_persp_move_far_rh_zo(prooj.raw, deltaFar) to avoid create new mat4
+ *       each time
+ *       
  * this function does not guarantee far >= near, be aware of that!
  *
  * @param[in, out] proj      projection matrix to extend
  * @param[in]      deltaFar  distance from existing far (negative to shink)
  */
 CGLM_INLINE
-void
+mat4s
 glms_persp_move_far_rh_zo(mat4s proj, float deltaFar) {
-  glm_persp_move_far_rh_zo(proj.raw, deltaFar);
+  mat4s dest;
+  dest = proj;
+  glm_persp_move_far_rh_zo(dest.raw, deltaFar);
+  return dest;
 }
 
 /*!