Chaos Corona for 3ds Max > [Max] Bug Reporting

Changes to layered materials with absorption in 1.6?

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Dippndots:
I've noticed a really significant slowdown when rendering a layered material with a refractive/absorbing material as a base (sea water with foam in this case). I wasn't aware anything changed here? What can I do?

maru:
Hi, can you show some comparison of this? Or an example material setup.
Also, the slowdown is compared to which version? 1.5?

Dippndots:
Hey Maru, I've attached a simplified sample scene below. It's specifically using distance tex. You can see from the screen grabs of the VFB that 1.5.2 is monumentally faster than 1.6 in this case.

maru:
Sorry for the delay. I have just checked this, but honestly I have no idea what is going on. It could be related to t he way the distance map is handled (maybe?).

One thing is that I was not able to get such huge difference between 1.5 hf2 and 1.6 hf1.

Another thing is that the renders come out completely different, and I did not change anything in the provided file.

Dippndots:
Weird, I will try doing a fresh install of corona 1.6.1. on Monday and see if that changes anything. I had previously just copied the unpacked 1.5.2 files and then copied 1.6 back on top of them.

Not sure why the provided file would render differently :(

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