HDRP multiple light shadow issues

I'm having trouble getting shadows to work correctly with multiple lights. In the first screenshot, I have only the primary light enabled which casts shadows correctly



Now I have a exact duplicate of that light but with very low intensity of 0.01 that is disabled.



If I enable the secondary light, the shadows disappear. Here is how it looks:



Here is the shadow setting under render pipeline asset.



Edit: If I increase the secondary light intensity then shadow starts appearing once again. Notice it in the screenshot below



This looks like a bug in HDRP. I'm using 1.10.0 preview. This happens in other versions as well.

 

Can you possibly reproduce this with simpler geometry or untextured geometry? It would logically show the issue far clearer to people unfamiliar with your model.

The shadow Atlas settings seem wrong as well... also watch how much space your dir light is taking up.

 

@hippocoder I have made it generic now. I don't think it's an issue with my hdrp asset settings.

Can you elaborate this "also watch how much space your dir light is taking up."?

 

I have made some more observations. This issue does not happen with point and spot lights. Also, disabling shadows on secondary directional light of any intensity fixes the shadows. Also, indirect light intensity, view bias, normal bias , view bias scale, near place, edge leakage settings have no effect on this issue.

 

With HDRP you have an atlas, and the directional light will take up a fixed amount of space in that atlas. Lights will often use less atlas space, but never more than they have - so there is typically some waste atlas space.

But when your light is set up to use more space than is available in the atlas, things will break. You are not even using power of 2 sizes, but I recommend you do, and you look to see if what you are asking of lights will fit. Do you have red errors in the console?

 

I get those error when I increase the shadow resolution to a high value. I have lowered the overall atlas resolution to as low as 2k and the lights proportionally but this issue still persists.

 

@uy3d Thanks for the reply! When will HDRP support multiple directional lights?

 

It does. Just not shadows on both.

 

Where is the define located?

 

It's on the HDRP asset, you don't need a define.

 

I am pretty sure that's what he was asking about mate. Not very moderator-y of you

edit.: I am not just ranting, I am reacting to it because I would like to know as well.

 

At the time of writing, directional shadows were not supported on more than one directional light. Now, with version 3-4, you can determine the budget for specific lights.

What does that have to do with being a moderator, stating facts?

 

That's not very moderator-y of you

 

How confusing! But this is offtopic now so I'll bow out.

 

We're simple human beings without the badge of honor which (as retarded as it might sound) excuses us to be petty and mean.

On the other hand you're the moderator, you're the beacon of structure, integrity and order. (if you didn't catch what the question was about no problemo, you were going after the actual question that was asked, which is alright)

Also, as far as I know there is no support for multiple duirectional light shadows but I am happy to be corrected.
PS.: no hard feelings for real man, we're coolios

 

Can I ask more about this? Does that mean HDRP does screen space contact shadows from directional lights by default?

 

It's user configurable now. I'll lock this thread as people keep using outdated information.