Hi again, this is a relatively simple example I made showing how a 3d movement can be achieved in Construct.
To test if two 3d objects are overlapping, you can test for a collision between the player and the 3d box, which will select all the 3d boxes which are overlapping on the x and y axis, and then finally we use a bit of maths to compare the z values (as 2 boxes wont overlap if they are at different depths).
I individually move the player along the x, y, and z axis so I can easy push the player out of the walls along the x, y, and z axis, allowing the objects to smoothly slide around obstacles.
To edit the level, simply control drag on the 3d boxes and the player will interact with it properly
Heres a cap download link:
http://www.fileshack.us/get_file.php?id ... zzzy3D.cap