Hello everybody,
lately I was experimenting with strata and outcrops. My latest works are qeite impressive, but after rendering, I noticed several things that shouldn´t be.

First, I had a little problem with the surface I don´t know how to handle. Second, on the top, there ist a hole I noticed, which may be the result of the twist and shear-shader. And third, the strange light on the stone wall. I guess this comes from the GI surface details I activated.
Maybe someone can tell me what this is and how I can correct them.
Thanks,
Predice