For transparency, use EntityAlpha. Check the examples in the help file, then have a look through the code archives.
To get 2D in Blitz3D, you can change the camera projection mode using CameraProjMode, and set to orthographic mode. This is quite tricky to get right - again have a look at the example in the help file.
Shadows aren't easy - with Blitz3D you've got many options, but it's best to pick one that suits your particular need. Again have a look through the code archives at some of the more complex techniques.
If you just want a simple circular soft shadow below a model, you can place a small quad (flat square) below the model, with a shadow texture on.
To make a shadow texture, you start with a black square as a normal image. Then you use the 'alpha' channel of your image to determine how strong the shadow is, what shape it is etc (have a look at Photoshop tutorials on the alpha channel).
Say you want a circular, soft edged shadow, you would use something on the ALPHA CHANNEL like this:
The shadow will be strongest in the centre (where the alpha channel has white pixels) and fade out where it is black. Remember, the RGB picture will just be a completely black square - the alpha channel determines how much of this black you see, hence you get a shadow in the shape above.
To get 2D in Blitz3D, you can change the camera projection mode using CameraProjMode, and set to orthographic mode. This is quite tricky to get right - again have a look at the example in the help file.
Shadows aren't easy - with Blitz3D you've got many options, but it's best to pick one that suits your particular need. Again have a look through the code archives at some of the more complex techniques.
If you just want a simple circular soft shadow below a model, you can place a small quad (flat square) below the model, with a shadow texture on.
To make a shadow texture, you start with a black square as a normal image. Then you use the 'alpha' channel of your image to determine how strong the shadow is, what shape it is etc (have a look at Photoshop tutorials on the alpha channel).
Say you want a circular, soft edged shadow, you would use something on the ALPHA CHANNEL like this:
The shadow will be strongest in the centre (where the alpha channel has white pixels) and fade out where it is black. Remember, the RGB picture will just be a completely black square - the alpha channel determines how much of this black you see, hence you get a shadow in the shape above.