New textures you want to be available in the EBE must be tile able and reside in this folder.
Game Guru\Files\ebebank\texturesource
There are no rounded shapes or round corners as of yet.
One could fabricate these is a model program and then link them in the EBE editor.
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 8gb RAM, Nvidia gtx660, Windows 7 Pro 64bit, Screen resolution 1680 x 1050.