On 12/25/19 9:57 AM, Norbert Kern wrote:
> Thomas de Groot <tho### [at] degrootorg> wrote:
> 
...
> 
> I simply made an black-white image of the trees alone and used it as an
> height_field filled with emitting media after orienting it towards the
> light_source.
> Despite using emitting media only it is slow when incorporated in the original
> scene, so it had to be rendered separatedly and combined in an extra scene.
> 

Amazing image - then and again now.

I found myself this morning pondering - not for the first time since 
your post - why the emitting media was so slow you couldn't use it in 
scene.

Radiosity?

Are the heightfield and scene shapes getting tangled causing messier 
media intervals in the full scene?

Do you have thoughts as to why? Guess, I expected such a technique to 
more or less be a direct adder compute wise in scene.

Bill P.

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