Sliding Down (scene To Scene)

I'm trying to create an effect whereby the character appears to be sliding down a hill/mountain from scene to scene. I have tried using portals to achieve this but so far not perfecting it. Just wondering if anyone has any advice on this can be achieved if possible? I want the effect to be seamless if possible to give the effect of a steep downhill slide level.

Thanks all.

 

Set game direction to 90 degree and see if it works

 

Excellent, thanks!