When program is on and sheet effects on, problem dont appear

but when i export - using config @Loopysue gimme on lasts post, appear those lines and cant know where they come.

Thanks

made this small landscape from a small area.

note on my map, i choice put the lakes (ponds) and the vegetation mostly on green (little valleys) part of the tundra - .... leaving the grey highlighted, as they aspect seems to me, rocky area and less vegetation.

Cheers

p.s. names are in portugues+son XD

dunno dont load full map...

anyway here is complete

Cheers