Light not casting evenly on 5x5 floor tiles

Hello!

The ground here is made up of 5x5 planes. In the image, you can see how a point light placed above a seam will light them unevenly. Removing the light (bottom image), and the light is even. If I were to move the light further from the seam, they'll end up being even, while still being lit.

This causes a problem for a point light that follows the player, for like a torch or something.

Anyone know why this is happening, and how I might be able to fix it?

Thanks!!

 

Another example...

 

I don't know if this is the right answer for you, but searching the forums I see the main recommendation is to increase the number of pixel lights under Project Settings > Quality.

Another tip I picked up in the forums that might work is to be sure the texture is set to Repeat, not Clamp.

 

Ah -- Project Settings > Quality | Pixel Lights was the culprit.

Maybe someone who knows more can correct me if I'm wrong, but I gather that each pixel will only take into account "Pixel Lights" number of lights. It was set to 4, and I had three wall mounted lights, plus I'm assuming the ambient light counts as one as well.

So each pixel will take into account the ambient and the 3 closes or most important or something lights. This is a good thing to know!

 

There's still similar issues on a wall here. Upping the pixel light count to something insanely high doesn't fix it, and all the textures are set to "Repeat" as well.

Any more ideas on other causes of this?

 

I don't know about that one. I'm suspicious of it being a corner, though. Could have something to do with it.

 

Yeah, it's confusing. It's not the corner -- well, that could be part of it for all I know -- but it also happens on flat walls.
(left of the light)

 

I don't know if this is the issue here, but I've seen that there can be bugs even in 5.3.4 where the realtime GI gets the directionality wrong on objects, and apparently this can change from bake to bake. So - if this bug is what you're getting here - you might see different objects get affected by it if you bake again.

See here: http://forum.unity3d.com/threads/re...in-unexplainable-results.405468/#post-2641912

And: http://forum.unity3d.com/threads/incorrect-directionality.403587/

 

It's possible that this is fixed in the new version of Unity: 5.3.5.

Here's some of the improvements made to GI:

• GI: Fixed incorrect normal mapping on Directional Specular lightmaps; shader code was not matching up what Enlighten was baking. (755421, 766533, 766546, 779696, 756020, 780025)
• GI: Clamped DynamicGI.indirectScale to allowed range. (664953)
• GI: Disabled LightProbeGroup components no longer display visualization in the scene view. (662572)
• GI: Fixed errors when using baked lightmaps & multi-scene editing. (753822)
• GI: Fixed realtime GI texture coordinates sometimes going wrong on static-batches meshes. (743273)
• GI: Fixed some cases of scenes not referencing the correct lighting data asset after bake. (757575)
• GI: Improved wording of various Enlighten error messages.
• GI: Now properly initialize baked scenes in some code paths to avoid error on console. (753822)
• GI: Upgraded to Enlighten3.02p4. Fixes direct lighting getting baked into lightmap (697565). Fixes a precision issue and out-of-bounds texture access in baking, which could lead to a crash in the Final Gather stage. (767110)
• GI: Changing Reflection Probe component positioning in the inspector makes realtime probe black. (653592)
• GI: Fixed a Reflection Probe baking issue when multiple scenes are used in a project.
• GI: Fix for baking a scene with objects added before saving the scene not being included in the result. (728610)
• GI: Fixed a crash when building reflection probe data on specific scenes containing Canvas elements. (767560, 763045)

 

I had a similar issue and found that some of my models had imported with the "Mobile/Diffuse" shader selected - changing it to the standard shader fixed it.