hello everyone, im a noobie selflearning via yt… first things first ^^
i came across the import real heightdata to unreal topic and been impressed… i just tried to replicate some work of the the tutorials but at some point i always struggle… i just fall thorugh my landscape but its not that easy, im pretty sure that i have done everything like in the video but idk whats wrong, my computer sux very much aswell, so at some point im asking myself is it becuz of my computer or my mistakes lol…
i just downloaded the height data via tangram and converted it to ue4 like in the tutorial ( the whole gimp action with 16bit greyscale and cutting it into levels with right x y name so world comp realize whats happening) the problem begins when loading every level (but same for just parts) and no matter how big or small i did it. (made a version in 9 parts and 64 parts/levels - the 64version did work even more less) at some points of my landscape i just drop through it and landing instantly in the starter content level… feels like im speedrunning some ■■■■ lol… but just on some parts of the level, especially at the lower stages, i can walk on every mountain but once i go down bye bye… i tried different materials on the landscape but no change and i tried to check the collision settings of the project and the game but no success… and oh yeah i watched at the recommended sizes from epic so its not that either
if any1 can help, i would be very thankful… i dont want the pain to give 64 levels a name again … 
thank you and cheers
PS: if it helps here is my specc and yea i know unreal want more then that xD but hey the map isnt fulll or textured at all… lol
Intel(R) Core™ i5-3470 CPU @ 3.20GHz 3.20 GHz
24,0 GB ddr3
gtx 1050ti
