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
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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