diff --git a/citro3d-sys/Cargo.toml b/citro3d-sys/Cargo.toml
index c1f1ee0..b0bd4ab 100644
--- a/citro3d-sys/Cargo.toml
+++ b/citro3d-sys/Cargo.toml
@@ -6,4 +6,4 @@ edition = "2021"
 
 [dependencies]
 libc = "0.2.116"
-ctru-sys = { path = "../../ctru-rs/ctru-sys" }
+ctru-sys = { git = "https://github.com/Meziu/ctru-rs.git" }
diff --git a/citro3d-sys/src/lib.rs b/citro3d-sys/src/lib.rs
index 1b58163..6a5b301 100644
--- a/citro3d-sys/src/lib.rs
+++ b/citro3d-sys/src/lib.rs
@@ -3,6 +3,7 @@
 #![feature(untagged_unions)] // used for [`C3D_Mtx`]
 
 pub mod base;
+pub mod renderqueue;
 pub mod texenv;
 pub mod uniforms;
 
@@ -15,7 +16,6 @@ mod bindings;
 
 pub use base::*;
 pub use bindings::*;
-pub use uniforms::*;
-
-#[cfg(todo = "gpu_tev_macros")]
+pub use renderqueue::*;
 pub use texenv::*;
+pub use uniforms::*;
diff --git a/citro3d-sys/src/renderqueue.rs b/citro3d-sys/src/renderqueue.rs
new file mode 100644
index 0000000..3385cfa
--- /dev/null
+++ b/citro3d-sys/src/renderqueue.rs
@@ -0,0 +1,10 @@
+//! `<c3d/renderqueue.h>`
+
+pub unsafe fn C3D_RenderTargetClear(
+    target: *mut crate::C3D_RenderTarget,
+    clearBits: crate::C3D_ClearBits,
+    clearColor: u32,
+    clearDepth: u32,
+) {
+    crate::C3D_FrameBufClear(&mut (*target).frameBuf, clearBits, clearColor, clearDepth);
+}
diff --git a/citro3d-sys/src/texenv.rs b/citro3d-sys/src/texenv.rs
index d296f60..5679987 100644
--- a/citro3d-sys/src/texenv.rs
+++ b/citro3d-sys/src/texenv.rs
@@ -1,11 +1,45 @@
-#![cfg(todo = "gpu_tev_macros")]
-//! `<c3d/texenv.h>`
+//! Definitions for `<c3d/texenv.h>`.
+//! Most of these functions are `static inline` so they don't get generated by `bindgen`.
+
+use core::ops::{BitOr, Shl};
 
-use super::*;
 use libc::c_int;
 
+use super::*;
+
+// TODO: why are these two different macros in C?
+
+/// Creates a texture combiner source parameter from three sources.
+fn gpu_tevsources<T>(a: T, b: T, c: T) -> T
+where
+    T: BitOr<Output = T> + Shl<u8, Output = T>,
+{
+    a | b << 4 | c << 8
+}
+
+/// Creates a texture combiner operand parameter from three operands.
+fn gpu_tevoperands<T>(a: T, b: T, c: T) -> T
+where
+    T: BitOr<Output = T> + Shl<u8, Output = T>,
+{
+    a | b << 4 | c << 8
+}
+
+pub unsafe fn C3D_TexEnvInit(env: *mut C3D_TexEnv) {
+    (*env).srcRgb = gpu_tevsources(ctru_sys::GPU_PREVIOUS, 0, 0) as u16;
+    (*env).srcAlpha = (*env).srcRgb;
+    (*env).__bindgen_anon_1.opAll = 0;
+    (*env).funcRgb = ctru_sys::GPU_REPLACE as u16;
+    (*env).funcAlpha = (*env).funcRgb;
+    (*env).color = 0xFFFFFFFF;
+    (*env).scaleRgb = ctru_sys::GPU_TEVSCALE_1 as u16;
+    (*env).scaleAlpha = ctru_sys::GPU_TEVSCALE_1 as u16;
+}
+
+// TODO: maybe
+
 pub unsafe fn C3D_TexEnvSrc(env: *mut C3D_TexEnv, mode: c_int, s1: c_int, s2: c_int, s3: c_int) {
-    let param = gpu_tevsources!(s1, s2, s3);
+    let param = gpu_tevsources(s1, s2, s3);
 
     if mode & C3D_RGB as i32 != 0 {
         (*env).srcRgb = param as u16;
@@ -17,14 +51,21 @@ pub unsafe fn C3D_TexEnvSrc(env: *mut C3D_TexEnv, mode: c_int, s1: c_int, s2: c_
 }
 
 pub unsafe fn C3D_TexEnvOp(env: *mut C3D_TexEnv, mode: c_int, o1: c_int, o2: c_int, o3: c_int) {
-    let param = gpu_tevoperands!(o1, o2, o3);
+    let param = gpu_tevoperands(o1, o2, o3);
 
     if mode & C3D_RGB as i32 != 0 {
-        (*env).opRgb = param as u16;
+        // (*env).opRgb = param as u16;
+        (*env)
+            .__bindgen_anon_1
+            .__bindgen_anon_1
+            .set_opRgb(param as u32);
     }
 
     if mode & C3D_Alpha as i32 != 0 {
-        (*env).opAlpha = param as u16;
+        (*env)
+            .__bindgen_anon_1
+            .__bindgen_anon_1
+            .set_opAlpha(param as u32);
     }
 }