E-Cycles - The fastest render engine for Blender. 3.2 release available now!

I am very curious if something was done about it :slight_smile:

Alpha management in the compositor is done by Blender and E-Cycles in this regard is 100% like Blender. A new version of the AI-Denoiser is in the work with own alpha management. I think it’s still wise to report the bug to make Blender more stable and reliable.

I’ll have a look at it today :slight_smile:

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You can see in the screen shot the render gets a gradient from top to bottom…

The scene is here if you want to check:
ecyclesdenoiser.blend (1.1 MB)

Edit: I found the issue. It happens in the environment render layer. If I disconnect it …the bloom goes away.

I do not know if it is possible, but when the background is transparent I believe the denoise setup should change. Someone already suggested my the workaround with an alpha node.

Bruno_Suraski found the cause in another addon.

On the occasion of the new way of creating portals, I decided to make a hermetic test related to the number of photons that pass through windows with a large number of frames. I created a multiportal and one portal. I think the graphics explain a lot. I did the test out of curiosity about the effect of frames on light entering through portals. Thanks to the new feature, creating multi-portals is very simple. The test showed more light using the multiportal


Cycles X :

Test builds:
Windows: https://builder.blender.org/download/cycles-x/cycles-x-blender-3.0.0-1dea1d93d39a-windows64.zip
Linux: https://builder.blender.org/download/cycles-x/cycles-x-blender-3.0.0-1dea1d93d39a-linux64.tar.xz
Mac: https://builder.blender.org/download/cycles-x/cycles-x-blender-3.0.0-1dea1d93d39a-macOS.dmg


Hi, I compared CyclesX to E-Cycles with a few tests and E-Cycles is still faster with “Fast” settings.
I cant imagine if E-Cycles is setup on top of CyclesX and how fast is this.
I guess we can see it in 4-6 month, or so.

Cheers, mib


I get weird artifacts on the cube and the ground plane with the Fast preset.
How to get rid of them?
My GPU: GTX 1070

render issue.blend (910.6 KB)

Hi, disable Adaptive Sampling.
I have no idea why it happen, got worse with more samples.
May you report it to Mathieu in reply of a mail from Gumroad or on Marketplace.

Cheers, mib


Ok, I’ll do so.
Thank you for help :slight_smile:

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excellent. thanks for the test! Any differences in the quality between the 2 renders?

Hi, I guess you meant E-Cycles/CyclesX, you cant compare at moment.
CyclesX render does not look like vanilla Cycles, is seams darker, MIS is not working correctly and some files are simply not work.
I opened a thread “CyclesX” with more tests from other user and more information.
If you have questions ask in this thread please, I don´t want to fill up this thread with CyclesX posts, it is really more a technical preview actually.

Cheers, mib


I’m happy the new portal creator is working great and helps reducing noise :slight_smile:

Sidenote: It also works with multi-object editing!


I’ve seen it and was very excited! But most of my results so far are even under E-Cycles Lite in terms of speed-up (both builds tested with file as is, same settings) and very far from the claimed up to 7x faster.

Many scenes are broken too as expected from a prototype. As @mib2berlin said, it’s better to wait to have comparable output before comparing render times as rendering volumes black is of course faster.

In the mean time, if someone manages to find a blend file where Cycles X renders correctly and is faster than E-Cycles, I’m happy to have a look at it!


New builds of E-Cycles are up!

  • new poral generator available in the face context menu
  • new SSAA mode for final render to get cristal clear results with OptiX or OIDN denoising
  • a new “fast mode” to speed-up rendering further automatically
  • improved viewport light groups add-on. The sync button now has smart detection of deactivated lights to optimize number of light groups, leading to faster rendering and better memory usage. A new delete operator was also added to easily clean up light groups passes.
  • a lot of polishing and bug fixes!

Made with E-Cycles recently:

Droid Character by Michael Weisheim

Otto’s Office - Lighting Variations by Justin Wentz

Post Apocalyptic Oil Refine Town by David yo


Is that oil refine town above an E-C render???.. It appears to have a painterly effect… I’m very curious about this.

are these changes only in 2.93_Beta?

Im also very interested

The oil effect is probably done in photoshop. From the arstation page:
tagging @KRUChY for the answer

For now final render SSAA and the light groups improvements changes are for 2.93 only yes to prepare for the 2.93 final. It will be ported to 3.00 when finished.