Shadowmap Generation Clip Space Issues

I am having an error when generating a shadow map using this tutorial: https://catlikecoding.com/unity/tutorials/scriptable-render-pipeline/spotlight-shadows/

For some reason the calculated clip space has a very small z component and I can't figure out why. If I set the clip.z manually it generates the shadow map so the error has something to do with the matrices.


SHADOW RENDER METHOD

Code (CSharp):

1.  void RenderShadowMap(ScriptableRenderContext context)
2.     {
3.         // shadow map texture format
4.         shadowMap = RenderTexture.GetTemporary(shadowMapSize, shadowMapSize, 16, RenderTextureFormat.Shadowmap);
5.         shadowMap.filterMode = FilterMode.Bilinear;
6.         shadowMap.wrapMode = TextureWrapMode.Clamp;
7.        
8.         // Set depth map to render
9.         CoreUtils.SetRenderTarget(shadowBuffer, shadowMap, RenderBufferLoadAction.DontCare, RenderBufferStoreAction.Store, ClearFlag.Depth);
10.         shadowBuffer.BeginSample("Render Shadow Map");
11.         context.ExecuteCommandBuffer(shadowBuffer);
12.         shadowBuffer.Clear();
13.  
14.         // Retrive VP matricies
15.         Matrix4x4 view, projection;
16.         ShadowSplitData splitData;
17.         cullResults.ComputeSpotShadowMatricesAndCullingPrimitives(0, out view, out projection, out splitData);
18.  
19.         shadowBuffer.SetViewProjectionMatrices(view, projection);
20.         context.ExecuteCommandBuffer(shadowBuffer);
21.         shadowBuffer.Clear();
22.  
23.         // Draw
24.         ShadowDrawingSettings shadowSettings = new ShadowDrawingSettings(cullResults, 0);
25.         context.DrawShadows(ref shadowSettings);
26.  
27.         shadowBuffer.SetGlobalTexture(shadowMapId, shadowMap);
28.  
29.         shadowBuffer.EndSample("Render Shadow Map");
30.         context.ExecuteCommandBuffer(shadowBuffer);
31.         shadowBuffer.Clear();
32.     }

SHADER CODE

Code (CSharp):

1. #ifndef MYRP_SHADOWCASTER_INCLUDED
2. #define MYRP_SHADOWCASTER_INCLUDED
3.  
4. #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
5.  
6. CBUFFER_START(UnityPerFrame)
7. float4x4 unity_MatrixVP;
8. CBUFFER_END
9.  
10. CBUFFER_START(UnityPerDraw)
11. float4x4 unity_ObjectToWorld;
12. CBUFFER_END
13.  
14. #define UNITY_MATRIX_M unity_ObjectToWorld
15. #define UNITY_MATRIX_VP unity_MatrixVP
16.  
17. #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/UnityInstancing.hlsl"
18.  
19. struct VertexInput
20. {
21.     float4 pos : POSITION;
22.     UNITY_VERTEX_INPUT_INSTANCE_ID
23. };
24.  
25. struct VertexOutput
26. {
27.     float4 clipPos : SV_POSITION;
28. };
29.  
30. VertexOutput ShadowCasterPassVertex(VertexInput input)
31. {
32.     VertexOutput output;
33.     UNITY_SETUP_INSTANCE_ID(input);
34.     float4 worldPos = mul(UNITY_MATRIX_M, float4(input.pos.xyz, 1.0));
35.     output.clipPos = mul(UNITY_MATRIX_VP, worldPos);
36.     return output;
37. }
38.  
39. float4 ShadowCasterPassFragment(VertexOutput input) : SV_TARGET
40. {
41.     return 0;
42. }
43.  
44. #endif // MYRP_SHADOWCASTER_INCLUDED