Messages

1

[Max] Resolved Bugs / Re: AMD vs INTEL Far Bump Calculation

« on: 2019-12-13, 16:55:40 »

Yes, AMD seems to be the proper one. Btw, not only xeons, but our older i7 cpu-s produce the same wrong image as well.

I've attached the 2016 version max file.

2

[Max] Resolved Bugs / Re: AMD vs INTEL Far Bump Calculation

« on: 2019-12-13, 15:21:06 »

Hello Everyone,

Corona Team, thank you for investigating this.

I've attached the max, but this bug can simply be recreated by adding a simple bumpy material to a plane, and look at it from a shallow angle.
I've also attached 2 other testrenders, where the difference is more visible. The issue occurs with really high glossiness (0,9+), and huge bumps - that's why it's mostly obvious with open water scenes.

Hope this helps with the troubleshooting.

Thanks,
Bence

3

[Max] Resolved Bugs / AMD vs INTEL Far Bump Calculation

« on: 2019-12-10, 21:10:35 »

Dear Corona Team,

We've encountered a strange issue which might be related to CPU manufacturers. In our office, we have dozens of Intel Xeon and i7 machines, as well as AMD Ryzen machines.
We are working on an animation, which involves river water rendering. The river water geometry is a simple plane, with a simple material, with bump, diffuse, etc, so no simulation included.

We experience that our ryzen and intel machines render the water differently, but the difference only occurs in the far distant areas, close to the horizon. I've attached the same frame rendered by a ryzen and an intel xeon machine. (We have the exact the same version of corona, max, plugins, scripts installed on all machines.)

We tried to investigate the issue by turning off diffuse, reflection, refraction, bump, etc, and what we experience is that this problem is most likely related to bump. If we turn off bump, the renders are the same. We turn bump on, it's different. Changing the bump texture in any way does not help.

Do you happen to know the reason or the solution for this issue?

Thank you,
Bence | ZOA Studio

4

Gallery / Re: Stand Corona

« on: 2017-09-12, 16:21:00 »

Sorry, but I had to do this :D


Cheers,
B