Excluding objects from casting shadows with python?

Game Engine Game Engine Support and Discussion
1

Hi everybody,

I am not able to get this work. :-/
In my scene there are 2 lights: 1 hemi and 1 spot.
I want the spot to be shadow-only, that works fine.
Now I want to limit that shadow-spot to certain objects (the bike). And that’s where I am stuck. As you can see on the screen below, the tree is casting a shadow on the ground as well as on the bike. That is what I need to get off.
I tried to limit the light to the layer, I tried to put it in a group…
Any hint what I am missing here?

Thanks in advance,
Quen

p.s. I’m using 2.49b

Attachments

settings.jpg1024×596 125 KB

sample.jpg666×766 145 KB

2

You need to activate the button “Layer” in the Lamp settings. Then move your bike in another layer as the lamp is. Hope it works.

3

Thanks for the hint.

This is really strange: it does work for the bike the way you described it. But I want to keep the bike shadow and remove the tree shadow. So I just moved the trees to another layer as the lamp is, but they still cast shadows! O.o
For a test, I appended the tree into a new, clean blend-file and there it worked. This is weird.

4

Ah found it finally…
I wrote a LOD script that uses the obj.visible prop to show and hide trees. When visibility is enabled this way, it does not seem to belong to a certain layer anymore. If I disable the script, it works :slight_smile:

Does anybody know, how to disable the shadow-cast or move the object to a certain layer via python?

5

By adding your object to the scene, you could do something like that:

newObj = sce.addObject(object, owner)

the owner object can you place in the layer which you want, so the new added object will be then in the same layer as the owner.

6

Thank you for your answer strub. I will try that tomorrow, leisure-time now :wink: