if your going to make a track for Rfactor then converted it to rfactor 2 .. here a few tips of the don't do. 1) don't make your road and added parts to the edge :eg: using the terrain to added a pit lane., this will cause a problem in rfactor 2. (yellow tint becomes apparent on terrain).make your pits using the normal road not terrain areas converted to road textures.This also occurs if you convert any 3dmax made track.(eg isi tracks from rf1) HAS YOU CAN SEE IN THE IMAGE ABOVE. The yellow tint will surface if you use any terrain has part of the road. 2) objects: need to have all faces on. don't deleted faces from bottom/back of models to save polys.it will cause a problem with shadows/lights bouncing through objects. (part of the real sky movement). 3) aiw files from rfactor1. are okay. don't use the current build 218 editor (it crashes a lot). 4) fences, singled sided objects. 5) do create extra nodes in your track modifier (usally 8+ pieces) has this will make the real road wet road look a better. (img below) I added some more laters if I find any.