Hi, I’m trying to make a material for the terrain with a splatmap and it comes out black, help please.
Yepa amigo que está intentando hacer? a ver si contactamos!!!
My question is… 5 layers max?¿??? i see pictures or videos use 10-12 layers or more in landscape… im use 5… but paint 6 layer… crash… 
Y sobre tu error, lo tienes puesto en roughness… cambiale a specular!.. roughnesss = reflejo-espejo. specular es lo que buscas!
El problema no es el reflejo que genera, si no que no aparece ni el color ni nada
Can any moderator help me?
Black textures on landscapes are likely because there are too many texture samplers in the material. I had a similar problem - and in my case, it was partly caused by the fact I used ‘height blend’ to blend the layers.
As a first step, try changing the blends to regular (ugly) alpha blends, and see if it works. I don’t know why it worked for me, but it seemed to help. (Duplicate your material first, as they are a pain to hook back up again!)
If that doesn’t, try removing a couple of texture sample nodes, and see if that solves the problem.
In my particular case, I kept the ‘height blend’, but used channel packing to remove 3 samplers. This seemed to make the difference.
Wish I could help more with the actual engine mechanics, but hopefully that’s your issue.