diff --git a/src/main/java/li/cil/oc2/client/renderer/ProjectorDepthRenderer.java b/src/main/java/li/cil/oc2/client/renderer/ProjectorDepthRenderer.java
index 474e21b6..62bc06e4 100644
--- a/src/main/java/li/cil/oc2/client/renderer/ProjectorDepthRenderer.java
+++ b/src/main/java/li/cil/oc2/client/renderer/ProjectorDepthRenderer.java
@@ -77,12 +77,11 @@ public final class ProjectorDepthRenderer {
     private static final float PROJECTOR_FAR = ProjectorBlockEntity.MAX_RENDER_DISTANCE;
     private static final int HALF_FRUSTUM_WIDTH = (ProjectorBlockEntity.MAX_WIDTH - 1) / 2;
     private static final int FRUSTUM_HEIGHT = ProjectorBlockEntity.MAX_HEIGHT - 1;
-    private static final Matrix4f DEPTH_CAMERA_PROJECTION_MATRIX = (new Matrix4f()).frustum(-HALF_FRUSTUM_WIDTH, HALF_FRUSTUM_WIDTH, FRUSTUM_HEIGHT, 0, PROJECTOR_NEAR, PROJECTOR_FAR);
-    /*getFrustumMatrix(
+    private static final Matrix4f DEPTH_CAMERA_PROJECTION_MATRIX = getFrustumMatrix(
         PROJECTOR_NEAR, PROJECTOR_FAR,
         ProjectorBlockEntity.MAX_GOOD_RENDER_DISTANCE,
         -HALF_FRUSTUM_WIDTH, HALF_FRUSTUM_WIDTH,
-        FRUSTUM_HEIGHT, 0);*/
+        FRUSTUM_HEIGHT, 0);
 
     private static final Cache<ProjectorBlockEntity, RenderInfo> RENDER_INFO = CacheBuilder.newBuilder()
         .expireAfterAccess(Duration.ofSeconds(5))
@@ -412,12 +411,11 @@ public final class ProjectorDepthRenderer {
     }
 
     private static void prepareOrthographicRendering(final Minecraft minecraft) {
-        float half_width = minecraft.getWindow().getWidth()/2f;
-        float half_height = minecraft.getWindow().getHeight()/2f;
-        final Matrix4f screenProjectionMatrix = (new Matrix4f()).setOrtho(0, minecraft.getWindow().getWidth(), 0, minecraft.getWindow().getHeight(), 1000, 3000);
+        float f = 3000 - 1000;
+        final Matrix4f screenProjectionMatrix = new Matrix4f(2.0F / minecraft.getWindow().getWidth(), 0f, 0f, -1f, 0f, 2.0f / -minecraft.getWindow().getHeight(), 0f, 1f, 0f, 0f, -2.0f / f, -(3000 + 1000) / f, 0f, 0f, 0f, 1f);
             /*new Matrix4f().orthoSymmetric(
             minecraft.getWindow().getWidth(),
-            minecraft.getWindow().getHeight(),
+            -minecraft.getWindow().getHeight(),
             0, 5000
         );*/