Per Instance Custom Data - data not static

Development Rendering
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1

Hello Epic,

The Node Per “Instance Custom Data” value changes when the camera view is changed.
How can the problem be solved?

With few instances it seems to work (<100 instance)

A lot of instances don’t work (+1000 instance)

How can the problem be solved?

See pictures and video:
[YouTube Video][1]

303109-material1.jpg
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303110-actor1.jpg
303110-actor1.jpg1928×1058 488 KB

2

This is exactly my issue too:

https://forums.unrealengine.com/development-discussion/rendering/1765990-perinstancecustomdata-not-working-in-hism

If you have a mesh with more vertices, the number of stable instances get way below 100. This PerInstanceCustomData works perfectly with ISM though. You can try that.

I have reported this as a bug, but it didn’t get submitted. So, I’m guessing it’s either in development or never gonna happen!

3

Hello,

I could see the bug in two instances already.
I hope epic corrects the bug.

4

Same problem here, I already reported it. Seems Per Instace Custom data is broken in 4.25

5

I was looking into this bug today, and it turns out that Epic committed a fix for it ~3 weeks ago on GitHub: https://github.com/EpicGames/UnrealEngine/commit/a2e9daf7280cbd7f395e0e03c0c430fabb168d40

I pulled the change locally and it fixes the bug for me.

6

Hello chalonverse,

thanks for the information.
I tried it too. It works. :slight_smile: