Anyone else notice it? You can now "sculpt" displacements, and there's an instancing menu. Now the grid's gone and models are black in 3d view, valve needs to fix it soon. I think it's a merge of the l4d2 sdk and source sdk.
I never understood engine limits. If engines are just a method of computing data and displaying it, then wouldn't the only limit be the power of the computer it's being run on?