Pb with instances, mem and triangulation

[BorderLine]

Hello everybody
2 weird things:
1 - Always a problem with instances that appear / disappear.
I have to close the layout, the modeler, the Hub and any reopening. On a big urgent project, it's painful.
2 - A problem who just appear, triangulations faces render visible ! And i've touch anything in modeler.
See attached.
Thanks in advance

[juanjgon]

The triangulation problem can be a ray epsilon issue. Tune it in the kernel node to see if this helps.

About the instancing, can you please send to me a scene with this issue to test it here?

-Juanjo

[BorderLine]

Hi Juanjo,
Same scene i send you yesterday by wetransfer.

[BorderLine]

The triangulation problem can be a ray epsilon issue. Tune it in the kernel node to see if this helps.

About the instancing, can you please send to me a scene with this issue to test it here?

-Juanjo

How please ?

[juanjgon]

Set the Ray epsilon parameter to something bigger, like 1 mm for example.

-Juanjo

[BorderLine]

Same problem with 1 mm. But i've an idea because i've normal map on this texture. If i sup normal map, it's OK !

[juanjgon]

Ah, yes, a wrong normal map can be also the problem. I am testing your scene here, but the instance rendering seems to work fine, I can't see them disappear.

Do you have this problem in the IPR or in the final F9/F10 rendering? When the instances disappear, can you see them in the viewports?

Could help if you enable the log file and send two logs to me, one when the instances are rendered fine and other when the instances are not rendered, to see what could be the difference.

-Juanjo

[BorderLine]

Yes, for instances problem, is'nt easy because it's time to time.
When i've the problem, it's in IPR and in F9 render.
When disappear, yes, i can see them in viewport.
Finaly, no problem for log files. I send you when problem happen.

For normal, what's a wrong normal ? Seems it's good for me.

Many thanks
Franck

[juanjgon]

Is it a normal map, or vertex normals? ... usually vertex normal can be corrupted if you rotate or scale the object in the modeler, but a texture normal map should work fine if the UV map is correct.

If you want to send to me this object with the normal map, I could test it here, or is it the same that I have here?

-Juanjo

[BorderLine]

Yes, same you have but yesterday, no problem with normal map !