srealist, for this problem of spin ... moving slowly in stairs make you block 50% of time and go into a spin .. sometimes going in "corners" too ... Flying/Jumping stay the better way to move up until i find a answer but seems some automatic features avoiding block are disabled when using a full C2 motion control.
I don't work on the lights, it's a tutorial example with pre computed lights so there is some lights/shadows errors now (the new door). it's possible to have something more interactive with lights/shadows but i have a very poor 3D experience and i'm not sure the actual plugin release can managed dynamic lights very well.
Copperlicht/Coppercube are like C2, in progress but with some bugs and unworking features in some cases ... so with time it will be better ! .... a quick example ... the build in proximity sensor is bug ... i wanted to have the door open if player is near and close if far ... the only way to do that now is to create a custom function and Juantar can't create a C2 function for each copperlicht feature, make his plugin a monster ! .... so some clever priority choice must be done and actually i just make the door move left and right waiting for a debug sensor feature.