Shadow Issue?

[SpiderPig]

Been noticing this a bit but not sure what it is... it seems to grow as the camera moves but certain camera orientations make it disappear.  It's probably my material, or my mesh updates causing it but I do not know.

https://www.youtube.com/watch?v=1QE3NEumHxU

[SpiderPig]

Well I disabled my material and it's not that...  I'm only setting vertex positions.  No normals, tangents or bitangents... maybe that's the problem...

[Josh]

Looks like a crack in the terrain. I can see the background peeking through in some spots.

[SpiderPig]

There are some holes in the mesh but I don't think its causing the shadow problem. 

[Josh]

Oh, I see. I thought you were referring to the black line.

It looks like maybe the normals are wrong?

[Josh]

Or maybe you are seeing some shadow acne. What happens if you increase the light's shadow map size?

https://www.ultraengine.com/learn/Light_SetShadowMapSize?lang=cpp

[SpiderPig]

I think they were my normals actually.  I realised I was using an old shader I made so I changed it for my newer one with normal calculations in the geometry shader and I haven't noticed the issue yet.  Hopefully that was it.

[SpiderPig]

Hmm, I might have been wrong about what was causing the issue. 

[SpiderPig]

On 3/7/2023 at 5:44 PM, Josh said:

Or maybe you are seeing some shadow acne. What happens if you increase the light's shadow map size?

https://www.ultraengine.com/learn/Light_SetShadowMapSize?lang=cpp

I just tried it and it made no difference.  I tried a size of 32 and 8192.

[SpiderPig]

Issues disappears when I delete the directional light.