Alpha channel flashlight shadows

[Text_Fish]

Is it possible to have a texture with an alpha channel that casts a shadow when the L4D2 flashlight passes through it?

I'm looking for an effect like this but using the torch as a lightsource instead of (or even in addition to) the map lights: http://www.interlopers.net/tutorials/27738

I'm not averse to making a prop, although I would prefer just sticking a texture on a brush!

Thanks.

[dark0r]

It should work already, have you tried yet?

[Dives]

Absolutely. The brush just needs to be func_detail.

[Text_Fish]

Hrmm. Thanks for the suggestion Dives, but it doesn't seem to work.


That's just a testbox with a simple homemade alpha texture on a func_detail. There's a spotlight shining through it as well as my flashlight and the walls on the farside have a lightmap scale of 2.

Edit: I should probably also mention that the texture is repeated six times, so none of those "Joe"'s are shadows.

Does the VMT need any more info than:

Code: Select all

"LightmappedGeneric"
{
   "$basetexture" "Joe/joetest"
   "$translucent" 1
   "$nocull" 1
}


?

Cheers.

[dark0r]

Try adding these to your VMT:

Code: Select all

"$AlphaTest" "1"
"$AlphaTestReference" "0.3"
"$AllowAlphaToCoverage" "1"

EDIT: also, keep it as a func_detail, so then it doesn't cast a shadow itself

[Text_Fish]

Hmm. Thanks dark0r but that doesn't seem to fix it either. Maybe I'll go down the prop route when I've recharged my patience!

[Dives]

Oops sorry I forgot, it can't be used with $translucent, only $alphatest

[Text_Fish]

Hahah! Removing $translucent totally worked, thank you so much!