2sided material ?

[bernhard]

Does anybody know, if there are problems using a 2sided with render elements ?

for some reason, the light information can't be reproduced using the render elements...

thx a lot,
bernhard

[vlado]

It will work if you only use elements that are added together. If you multiply elements together, this will not work, for the following basic math reason:

In the rendering, the final color is calculated as:
(frontColor*frontLighting)*(1-translucency)+(backColor*backLighting)*translucenc y

However, if you use e.g. the diffuse and the rawLighting elements, you will get:
(frontColor*(1-translucency)+backColor*translucency)*(frontLighti ng*(1-translucency)+backLighting*translucency)

Obviously these results are very different from one another.

In general, you will need information from the front and back sides separately.

The same goes for e.g. the reflective elements of the VRayBlendMtl material with multiple reflection coatings.

Best regards,
Vlado