SR 3D Builder

SR 3D Builder is a tool to construct virtual Lego models in 3D. You can easily load model from other known programs: it supports the following formats like .dat, .ldr, and .mpd files. It features advanced model management with Groups and instruction step analysis, animation console to easily create and animate your technique models, belt generator with real connections, and automatic and precise positioning and orienteering of most bricks according to connection detection.