ECS and Motion Vectors

It seems that rendered entities don't get written into a motion vector map. Which means that they are not affected by motion blur. I tested with both built-in and HDRP pipelines (UWP does not support per-object motion blur).

Here's a direct test in HDRP between moving an Entity by the Translation component (red, top) and a GameObject (blue, bottom)

Spoiler: GameObject code

Code (CSharp):

1. using UnityEngine;
2.  
3. public class MoveSine : MonoBehaviour
4. {
5.     public float gain = 10;
6.     public float frequency = 10;
7.  
8.     void Update()
9.     {
10.         transform.position = new Vector3(
11.             Mathf.Sin(Time.time * frequency) * gain, 0, 0);
12.     }
13. }
14.  

Spoiler: ECS code

Code (CSharp):

1. using UnityEngine;
2. using Unity.Jobs;
3. using Unity.Collections;
4. using Unity.Mathematics;
5. using static Unity.Mathematics.math;
6. using Unity.Burst;
7. using Unity.Entities;
8. using Unity.Transforms;
9. using Unity.Rendering;
10.  
11. public class MoveSineSystem : JobComponentSystem
12. {
13.     [BurstCompile]
14.     struct MoveSineSystemJob : IJobForEach<Translation>
15.     {
16.         public float time;
17.         public float gain;
18.         public float frequency;
19.  
20.         public void Execute(ref Translation c0)
21.         {
22.             float x = sin(time * frequency) * gain;
23.             c0.Value = float3(x, c0.Value.y, 0);
24.         }
25.     }
26.  
27.     protected override JobHandle OnUpdate(JobHandle inputDeps)
28.     {
29.         return new MoveSineSystemJob()
30.         {
31.             time = Time.time,
32.             gain = 10,
33.             frequency = 10
34.         }.Schedule(this, inputDeps);
35.     }
36. }

Here is also an example I also posted on the physics discussion thread, running with built-in renderer comparison between GameObject-based physics (PhysX) and DOTS (Havok) with motion vectors debug view:



Is there something I'm missing or is it something that's not possible yet?

 

I am suffering from this annoying bug too.
Seems there is nothing like motion inside Unity.Rendering.RenderMesh. If u find a solution, please tell me

 

GREAT!!!!!