Hi all,
in order to simulate lab results I would characterize a black paint (like as spray can) to replicate the result obtained on a prototype to which a layer of the aforementioned paint has been applied.
If I use coat I.05 or ABSORB the results do not seem to me to be comparable.
Thanks
Best answer by Sandrine Auriol
Hi Luca
In our examples, we model black paint by a MIRROR material and a coating I.95. It means that 5% of the light will be reflected. The rest will be absorbed.
Then to split these 5% between specular and scattered light, we set a Lambertian model with a scatter fraction of 0.8. That means that 5% x 0.8 = 4% will be scattered, so 1% will be in the specular. It is usually a good start but can be further improved.
For example, Acktar shares some info on their website so that can give some ideas for a first model: https://acktar.com/product/lambertian-black/
Hi Luca
In our examples, we model black paint by a MIRROR material and a coating I.95. It means that 5% of the light will be reflected. The rest will be absorbed.
Then to split these 5% between specular and scattered light, we set a Lambertian model with a scatter fraction of 0.8. That means that 5% x 0.8 = 4% will be scattered, so 1% will be in the specular. It is usually a good start but can be further improved.
For example, Acktar shares some info on their website so that can give some ideas for a first model: https://acktar.com/product/lambertian-black/
Thank you very much Sandrine, your answer will surely help us both in this project and in future ones.
Hi Luca
In our examples, we model black paint by a MIRROR material and a coating I.95. It means that 5% of the light will be reflected. The rest will be absorbed.
Then to split these 5% between specular and scattered light, we set a Lambertian model with a scatter fraction of 0.8. That means that 5% x 0.8 = 4% will be scattered, so 1% will be in the specular. It is usually a good start but can be further improved.
For example, Acktar shares some info on their website so that can give some ideas for a first model: https://acktar.com/product/lambertian-black/
Hi Sandrine,
did you have the opportunity to characterize the scatter also for a generic white paint?
Thanks a lot.
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