View Full Version : How to create a shadow pass

04-03-2006, 09:09 AM

I want to create a shadows pass for my particles. In 3DSMax I only have to create a Matt/Shadow material and the object generate only a shadows layer. The alpha is affected only by the shadows...

How can I create that in LW. I try to play with the "matt Object" properties and "Alpha Channel" but I don't find.

I really need to separate the particles, the backgroung and the particles shadows...

Thank You!

04-03-2006, 09:19 AM
set your particles and shadow casting objects to 'unseen by camera' in the object properties panels.

then in your shadow-receiving object's surface, in the advanced tab of the surface editor, set the alpha channel to 'shadow density' instead of 'surface opacity'.

04-03-2006, 09:24 AM
or you can add 'Render Buffer Export' in the image processing panel and export the shadow pass as a rendered image sequence at the same time as your normal render is rendering.

04-03-2006, 01:00 PM
Thank You Jeremy!!!!

Should be could to have an overide for 'shadow density' directly in the object properties. All Shadows/Matt fonction a the same place.