View Full Version : Bitmap Shadows? Translucency?

09 September 2002, 05:07 PM
Hi, i have a real challenge (for me).
Can somebody help me?
Im going to explain this effect:

When i take a 35mm photo film (the negative -- Filmstrip) and put it on front of a
white surface (few mm from it), and a light pointing to it, i find
that the shadow of the film isn't gray!!
It has the same colors of the film and i can even see the images of the film projected on the surface, but a little bit blured and
increasing this blur as i move the film away from the surface. (this is the same effect when developing films).

I tried different solutions, but none can give me the right effect:
- Translucent surface
- Transparent surface
- A spotlight with an image.
- The film, with 800% luminosity and radiosity

Help PLEASE!!!!

fabian mejia

09 September 2002, 08:34 PM
U described two effects - colored shadow and blured shadow...
For first one change Color filter to 100 % (Surface editor -> Advanced tub -> Color Filter) and use regular spot or distance lights with shadows...

For the second try to use area light...

09 September 2002, 10:20 PM
Yes, it works!!!
indeed.... i used area light and i can see the blur .... but the shadows have a little "granularity".

Rumpus King
09 September 2002, 11:16 PM
Try either increasing the area light quality or sizing it down.

09 September 2002, 05:42 AM
Also check ON Shading Noise Reduction in Global illumination...

09 September 2002, 01:24 PM
Thank you all!!!!!!

Everything works fine

09 September 2002, 03:13 PM
When using Arealights you donīt need the highes quality if you use enhanced antialiasing. Because LW renders the shadows many times a bit different then put it together. So you can sometimes get a really good result with a low Alight quality and Enhanced Medium AA or higher and sometimes better renderspeed. :)
The quality of the shadows increase for every enhanced antialiasing step.
Reflectionblur and radiosity wotk the same way..

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