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[Max] I need help! / CoronaPhysical Mtl & Physical Mtl Questions
« on: Today at 17:21:21 »
Recently ive been confused by a few things in the the Corona that over the years ive learned to live with.
couple of questions; For the attached example, Physical material is on the left and corona on the right.
1. Why does inverting a map in the bitmap node result in a different output than if i invert it within a corona colour correct node?
2. Why do the same PBR maps connected to both a corona physical material and an autodesk physical material render differently to each other? Ive attached an example compariso_galv.jpg. On the left is a physical material, the right is a corona material. Both seem slightly different colours and also seem to be reflecting differently. It seems corona assumes metals have an IOR of 2-3 because i had to set the physical material to 2.5 to get a close match. Is it just down to a different implementation of metalness?
3. It appears to me that physical materials render much faster and clean up much quicker with the gpu denoiser. At least during this testing thats what i saw. For instance in the attached comparison, the corona material on the right is far more blurry than the physical on the left which has cleared up in the same number of passes.
Not a huge difference but im looking at the viability of using physical materials instead of corona for better compatibility with our pipeline at work and just noticed a few subtle differences.
couple of questions; For the attached example, Physical material is on the left and corona on the right.
1. Why does inverting a map in the bitmap node result in a different output than if i invert it within a corona colour correct node?
2. Why do the same PBR maps connected to both a corona physical material and an autodesk physical material render differently to each other? Ive attached an example compariso_galv.jpg. On the left is a physical material, the right is a corona material. Both seem slightly different colours and also seem to be reflecting differently. It seems corona assumes metals have an IOR of 2-3 because i had to set the physical material to 2.5 to get a close match. Is it just down to a different implementation of metalness?
3. It appears to me that physical materials render much faster and clean up much quicker with the gpu denoiser. At least during this testing thats what i saw. For instance in the attached comparison, the corona material on the right is far more blurry than the physical on the left which has cleared up in the same number of passes.
Not a huge difference but im looking at the viability of using physical materials instead of corona for better compatibility with our pipeline at work and just noticed a few subtle differences.