SeedRandom[1234];data2d=RandomFunction[RandomWalkProcess[0.5],{0,10^3},2];

Graphics[Line[Transpose@data2d["States"]],AspectRatio->Automatic]

data3d=RandomFunction[RandomWalkProcess[0.5],{0,10^3},3];

Graphics3D[Line[Transpose@data3d["States"]],BoxRatios->Automatic]