Corona slow render times/parsing scene loop/ connection failed with DR

[Gabiru]

Hello everyone im working on a company for almost 2 years now as architecture visualizer. We were using VRay till half year ago then we moved to corona, we like a lot to work with it, its a really faster process overall and we would like to keep using it, but we getting a lot of trouble when rendering scenes. Overall all scenes seems to render 2 times slower than VRay used to, thats a big problem. Beside that we have a lot of issues with DR. A lot of times happens that parsing scene lasts forever and also a connection fail loop and it was evberything working nicely on VRay. We have 3 licenses with 4 DR nodes each license, but we are thinking to go back to VRay if theres no solution to this slow renders. As around the web we cant find solution for our problem im here to ask for help so we can keep using this engine that i actually love the workflow but its extremely slow when compared to VRay renders. Cheers and thanks

[maru]

Hi,

Overall all scenes seems to render 2 times slower than VRay used to, thats a big problem.

Render times to acceptable quality may differ between V-Ray and Corona. They are simply two different renderers. One scene may render faster in Corona, another one may render faster in V-Ray. The issue may be however caused by some incorrect setup (either in the scene or in render settings), so taking a look at the scene and inspecting it would be the best idea.

Beside that we have a lot of issues with DR. A lot of times happens that parsing scene lasts forever and also a connection fail loop and it was evberything working nicely on VRay. We have 3 licenses with 4 DR nodes each license, but we are thinking to go back to VRay if theres no solution to this slow renders. As around the web we cant find solution for our problem im here to ask for help so we can keep using this engine that i actually love the workflow but its extremely slow when compared to VRay renders. Cheers and thanks

DR issues are often hard to diagnose. Please try the following points, which are based on our past user reports. In most cases, they are the easiest way to get the issue resolved.

First and most important thing - provide DR logs - https://coronarenderer.freshdesk.com/support/solutions/articles/12000002065-gathering-dr-logs

- Disable any antivirus software you are using on all PCs (including Windows Defender and Firewall) - this is just to check if the issue is related to this software. You can then turn it back on.
- Open your scene, go to Render Setup, deselect the small "lock" icon in the top right corner. Click on any viewport, then click on the viewport you want to render again. Enable the "lock" icon in the top right corner of the Render Setup window again. Resave your scene. Unlocking and locking viewport like this sometimes helps with DR issues.
- Refresh the 3ds Max ENU folder by either renaming or removing it. Note that this will remove all your custom ui settings, keyboard shortcuts, etc, so it is best to leave a backup of the ENU folder.
See: https://knowledge.autodesk.com/support/3ds-max/learn-explore/caas/sfdcarticles/sfdcarticles/Resetting-3ds-Max-3ds-Max-Design.html

- If the above 3 points did not help, here are some other ones worth trying:

- Add custom inbound/outbound rules in Windows Firewall.
See: Creating custom inbound and outbound rules for the DR Server application
- Are you using some VPN software? If so, please stop using it and make sure you are using BB/DR on a "classic" local network.
- Do not mix Corona's DR and Backburner. Use only one or the other.
- Make sure on each computer there is only one instance of: 3ds Max, DR server, Backburner. If there are multiple instances running at the same time (for example two 3dsmax.exe processes), some issues may appear.
- Do not render from perspective view - use some kind of camera, preferably Corona Camera.
- Disable IPv6.
See: https://medium.com/@JockDaRock/disabling-ipv6-on-network-adapter-windows-10-5fad010bca75
- Go to Windows Services list and make sure "Function Discovery Provider Host" and "Function Discovery Resource Publication" are started. Set them to automatic start.
- Make sure you have network discovery enabled.
See: https://www.isunshare.com/windows-10/turn-on-or-off-network-discovery-in-windows-10.html

Other than that, I would recommend contacting us at https://coronarenderer.freshdesk.com/support/tickets/new
That would be simply much more convenient that solving the issue on the forum.