CalcVolumetric calls for MaterialData

On 28/01/2013 at 06:17, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   13 
Platform:   Windows  ;   
Language(s) :     C++  ;


i am messing around with a volumetric material plugin and came across an issue.

It must evaluate the incomming light at some points in the medium. For this i use vd->IlluminateAnyPoint. The material is assigned to a box. The problem is that the transmission coefficient of the medium is only evaluated (by another call to CalcVolumetric) for lightsource outside the medium. See figure.

Is there a way to trick Cinema into calling CalcVolumetric for the ray towards the light source in the top figure? If not, is there a way to determine if CalcVolumetric was called? How about arealights which could be partially in the volume?


On 28/01/2013 at 07:33, xxxxxxxx wrote:

Hi Michael,

I forwarded your question directly to the developers.

On 29/01/2013 at 01:01, xxxxxxxx wrote:

Thank you