[Bf-committers] Transmissivity

[Ed Halley]

Please ensure that airpockets inside refractive objects have their  
normals
pointed toward the air.  Since blender's renderer is "context free",  
and the
IOR slider only goes to values greater-or-equal to 1.0, it is vitally
important that the less dense material is on the "outside" of any given
polygon.

I will be writing up some new docs on the wiki page about  
transmissivity,
since there are now two new controls that can adjust the effect for an
artistic value.  In addition to that, I will explain how to properly  
model
media junctions such as air or crystal submmerged (or partially  
submerged)
in water.

If you still feel blender's not handling your model correctly, let me  
know.

On Jun 16, 2006, at 12:00 PM, Frédéric van der Essen wrote:

> Awesome stuff !
> But it seems that the hollow parts in non-convex meshes are  
> considered having 2x the density. Maybe i'm misunderstanding  
> something, but it looks
> quite strange ; shouldn't the hollow parts be less opaque than the  
> rest ?
>
> : www.mentalwarp.com/~fred/divers/blender/depth.png
> : http://www.mentalwarp.com/~fred/divers/blender/depthParam.png
>
>> ton (Ton Roosendaal) 2006/06/16 15:11:21 CEST
>>
>>   Modified files:
>>     blender/source/blender/blenkernel/intern material.c      
>> blender/source/blender/makesdna DNA_material_types.h     blender/ 
>> source/blender/render/intern/source ray.c     blender/source/ 
>> blender/src buttons_shading.c     Log:
>>   The new "transmissivity" option for ray-transparent now can be  
>> controlled.
>>   By default it is disabled (depth 0.0), so rendering is as usual.
>>     The meaning of "depth" and "falloff" will be extensively shown  
>> in the
>>   release log pages. Coming soon!
>>     (Patch provided by Ed Halley)
>>
>
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