diff --git a/nx/include/switch.h b/nx/include/switch.h
index db30bdc4..7dda99f6 100644
--- a/nx/include/switch.h
+++ b/nx/include/switch.h
@@ -62,6 +62,7 @@ extern "C" {
 #include "switch/nvidia/channel.h"
 #include "switch/nvidia/info.h"
 #include "switch/nvidia/fence.h"
+#include "switch/nvidia/rect.h"
 #include "switch/nvidia/gpu/cmd_list.h"
 #include "switch/nvidia/gpu/gpfifo.h"
 #include "switch/nvidia/gpu/zcull_ctx.h"
@@ -73,6 +74,7 @@ extern "C" {
 #include "switch/nvidia/cmds/3d.h"
 #include "switch/nvidia/cmds/3d_init.h"
 #include "switch/nvidia/cmds/3d_rendertarget.h"
+#include "switch/nvidia/cmds/3d_viewport.h"
 #include "switch/nvidia/cmds/3d_clear.h"
 
 #include "switch/runtime/env.h"
diff --git a/nx/include/switch/nvidia/cmds/3d_viewport.h b/nx/include/switch/nvidia/cmds/3d_viewport.h
new file mode 100644
index 00000000..856086f9
--- /dev/null
+++ b/nx/include/switch/nvidia/cmds/3d_viewport.h
@@ -0,0 +1,38 @@
+typedef struct {
+    float scale[3];
+    float translate[3];
+    u16_rect window;
+    float near;
+    float far;
+} VnViewportConfig;
+
+static inline void vnViewportSetScale(VnViewportConfig* c, float x, float y, float z) {
+    c->scale[0] = x;
+    c->scale[1] = y;
+    c->scale[2] = z;
+}
+
+static inline void vnViewportSetTranslate(VnViewportConfig* c, float x, float y, float z) {
+    c->translate[0] = x;
+    c->translate[1] = y;
+    c->translate[2] = z;
+}
+
+static inline void vnViewportSetWindow(VnViewportConfig* c, u16_rect r) {
+    c->window = r;
+}
+
+static inline void vnViewportSetDepth(VnViewportConfig* c, float near, float far) {
+    c->near = near;
+    c->far = far;
+}
+
+static inline void vnViewportSetDefaults(VnViewportConfig* c) {
+    vnViewportSetScale(c, 0.5, 0.5, 0.5);
+    vnViewportSetTranslate(c, 0.5, 0.5, 0.5);
+    vnViewportSetWindow(c, (u16_rect) { 0, 0, 0xFFFF, 0xFFFF });
+    vnViewportSetDepth(c, 0, 0); //?
+}
+
+void vnSetViewport(Vn* vn, size_t index, VnViewportConfig* c);
+
diff --git a/nx/include/switch/nvidia/rect.h b/nx/include/switch/nvidia/rect.h
new file mode 100644
index 00000000..6155cbf1
--- /dev/null
+++ b/nx/include/switch/nvidia/rect.h
@@ -0,0 +1,12 @@
+#define MAKE_RECT(type) \
+    typedef struct { \
+        type x; \
+        type y; \
+        type w; \
+        type h; \
+    } type##_rect;
+
+MAKE_RECT(u16);
+MAKE_RECT(u32);
+MAKE_RECT(float);
+MAKE_RECT(double);
diff --git a/nx/source/nvidia/cmds/3d_viewport.c b/nx/source/nvidia/cmds/3d_viewport.c
new file mode 100644
index 00000000..a6698eb6
--- /dev/null
+++ b/nx/source/nvidia/cmds/3d_viewport.c
@@ -0,0 +1,28 @@
+#include <switch.h>
+#include <string.h>
+
+void vnSetViewport(Vn* vn, size_t index, VnViewportConfig* c) {
+    VnCmd(
+        vn,
+        NvIncr(
+            0,
+            NvReg3D_ViewportScaleX(index),
+            c->scale[0], // ScaleX
+            c->scale[1], // ScaleY
+            c->scale[2], // ScaleZ
+            c->translate[0], // TranslateX
+            c->translate[1], // TranslateY
+            c->translate[2], // TranslateZ
+            0, // Swizzles
+            0  // SubpixelPrecisionBias
+        ),
+        NvIncr(
+            0,
+            NvReg3D_ViewportHorizontal(index),
+            (c->window.w << 16) | c->window.x,
+            (c->window.h << 16) | c->window.y,
+            c->near,
+            c->far
+        )
+    );
+}