Hi,

In materials.cpp tutorial, how to change the object's transparency? I assume by changing the material's transparency as shapes are transparent without material.

So I thought the 4th parameter in <some_material>.color.set(r,g,b,a) would affect alpha, but it doesn't appear to, as whether it's set to 0 (default for materials.cpp) or 1 (default in material.h), all objects remain opaque.

In the tutorial's update() function, I also tried changing the alpha like so:
material_rfl .color.w=0.5f;
material_fur .color.w=0.5f;

...but this also did nothing.

Change Tech from Default to Blend or Blend Light.

If you want full Alpha you can use either Alpha Test or Blend.. the only difference is that the Blend is also effected by light sources. If u want just a part transparent you can make either the texture itself transparent. And export it as e.g .png to save also the alpha channel or you can make a alpha map - single channel "Channel red is preferred".

You can read about it more here: http://www.esenthel.com/wiki/index.php?title=Material

Thanks for helping, Driklyn and Dynad.