Enivob opened this issue on Aug 15, 2006 · 10 posts
Enivob posted Tue, 15 August 2006 at 2:23 PM
Hi All,
Is there a way to adjust the shadow denstity for a Spot Lamp?
Enivob
oldskoolPunk posted Thu, 17 August 2006 at 5:41 PM
Not sure what you mean by denser. The samples value acts like AA on the shadow, the soft setting acts like a blur, and the bias setting acts to darken/lighten the shadow.
You might be talking about volumetric shadows and lighting. To achieve this, first turn on the halo button for the spot. This will give you the volumetric light. To create the volumetric shadows, set the Halo Step value. 1 will be the most defined volumetric shadow(and also the slowest to render). A value of 8 would be a good level to test render at. A value of zero disables volumetric shadows.
Enivob posted Fri, 18 August 2006 at 10:22 AM
Once again, I'll refer to 3DSMAx.
When a shadow is cast in blender, has a certain density to it. This density seems to be 100% opaque. Now in 3DSMax, you can set the density of the shadow so it's "opaqueness" is less. This lets more of the color of the object that the shadow is falling upon shine through. So in a way I am looking for the alpha fader for shadows in blender.
As I type this I realize, I can render out a shadow pass and then composite it back together at whatever density I desire, but in 3DSMax that is built in to the renderer. It seems like a natural thing to be there, but I guess Blender does not have that (yet!)
Thanks for the replys.
oldskoolPunk posted Fri, 18 August 2006 at 10:29 AM
Quote - and the bias setting acts to darken/lighten the shadow.
haloedrain posted Fri, 18 August 2006 at 7:50 PM
Go to the material of the object that receives the shadow and try adjusting the ambient slider in the Shaders tab. This might not be exactly what you want, but I think it may be as close as blender can get?
...Ok, I can't actually get that to do anything right now, but I swear it used to.
damir_prebeg posted Mon, 21 August 2006 at 3:30 AM
Is this what you want to get?
Default:
Transparent shadow:
haloedrain posted Mon, 21 August 2006 at 12:12 PM
Just as an aside, I've got some file locker space as a coordinator, I can host stuff like this for the forum so you don't have to put them in attached images like that ;)
damir_prebeg posted Mon, 21 August 2006 at 12:29 PM
Quote - Just as an aside, I've got some file locker space as a coordinator, I can host stuff like this for the forum so you don't have to put them in attached images like that ;)
Thanks haloedrain :)
Enivob posted Mon, 21 August 2006 at 1:38 PM
Ok **damir_prebeg,
Nice picutre, but how did you do it?
Most of the time when I try to look things up in the blender manual I get "This page has is not written yet"**
damir_prebeg posted Mon, 21 August 2006 at 2:24 PM
Nice picutre, but how did you do it?
As I said before, download this http://www.renderosity.com/mod/forumpro/media/folder_8/file_351683.jpg and change extension to zip, thats zipped blend file and see how it's done.
But in words, I have created ground plane in layer 1 and those cubes in layer 2. In layer 1 I've placed two spot lights at same place. First spot light has default light settings but the other is setted to iluminate only objects in the same layer (eg. that ground plane) and has intensity of light (energy) setted to 0.3.
In layer 2 I have placed one hemi light in exact oposite X and Y of those spot lights in layer 1 (just copy that second spot light that iluminates only things in same layer, change it's type to hemi and move it to layer 2. Change X and Y of that light to positive values).
Now spot light 1 iluminates all objects, spotlight 2 iluminates only groundplane and that hemi light iluminates only boxes but from behind (but note that hemi light is oriented at same direction as spot lights).
Well, I hope that this is helpfull to you...
Damir
