|Image from stabyourself.net|
Ah, I removed the "upin", "downin", "leftin" and "rightin" properties because it was very hard to do, for something that wouldn't be used so much. Also, you can actually do this by just making an transparent block having these properties and you're done!
In these images, the "platforms" don't have the "grid" property, but have the "portalsides":
About "deadly" tiles, remember when I said I was going to fix the collisions in order to make them non-solid but deadly? Well, I'm not gonna do it anymore. Why? Because of all those new properties! You can make them "solid", "grid" and "playeronlycol" (optional) and they'll work perfectly!
But I'm not done yet with properties. I haven't made the "entitiesside" property yet (they'll make the tiles block things like light bridges only if they're passing through their colliding sides), and I'll also add the "overlay tile", so they're drawn in front of everything. When I have them working I'll post here and release a beta for you guys (that's right, I'll release a beta version of the mod here, so you all can test it before I finish and send to stabyourself.net's forums). So, I see you in my next post!