Hi, I'm the BlockCAD author, quite a nice site you have here. Thanks for listing my program! It will take me a while to look around everywhere.
If you haven't looked at it yet, take a glance at the BlockCAD Gallery
where I'm showcasing models built by people all around the world - there are some amazing models there, especially in the Buildings
Some collected answers and musings:
- Graphical glitches
Yes, they're there. Intentionally. They are not a result of your graphics card, as BC is only using plain Windows GDI drawing, no acceleration at all. Try clicking the brush button for a (re-sort and) repaint.
BC started as a Windows 3.1 program in 1996 (or -7, I don't remember any more), and to get my, at the time, frontline 486 DX 50 to be able to rotate anything at all in 'real time' there are lots of cheats and shortcuts in the program (the Pascal source is available for anyone brave enough...).
I have no plans to change this, as there are now many other free Lego CAD programs, much more advanced than BC (MLCad, Bricksmith, Lego Digital Designer, LeoCAD, and so on).
The main thing with BC is that it's easy to use, even for small children.
- Too few parts
The part editor is included, just right click in the part selection window on something that's more or less like the part you need and select Add...
and start experimenting. No additional documentation available, you're on your own
- No Technic parts, no ... parts, etc
The shortcuts/limitations of BlockCAD makes it impossible for the program to draw a part that is completely or partly inside another part. This excludes almost all Technic parts, and a lot of other things. This is a design decision.
: What more control of the interface do you need? I'm open to suggestions (although the update rate has gone down a lot in later years).
: Adding parts is not supposed to work at all in plain Front View, as there is too little information for the program to add parts at the right place. So, this is probably a bug.
is also a good place to search for sets and pieces.
: The wheels can be put anywhere, you don't need the special pieces (that's called 'artistic freedom').
Sorry for the long post, but I always get a bit carried away when talking about Lego and BlockCAD...