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Sycles 2.4.1Author: Shekn @si-community V 2.4.1 released August 2026 —
This is a full integration of the Blender Cycles renderer into XSI. Version 2.4 is
compiled with Cycles 5.3 (state of July 2026). The second generation of the addon
(since 2.0) is a complete rewrite and works with Softimage 2015 SP2.
New since version 2.1.3 (from the github release notes):
2.4.1: fixed incorrect transforms of instances when the master model has rotation or scale,
repacked with missing DLLs
2.4: Cycles 5.3. New Alpha parameter for the ImageTexture node, Sky Texture with Single
and Multiple Scattering models, Thin Film for Metallic and Glass BSDF, new Raycast
and Scene Time nodes, OSL custom camera, Linear 3D curve shape (also as per-object
override), Geometry Approximation mode for NURBS surfaces, Render Time pass (CPU),
texture optimisation (resolution, limit, tx texture cache) and a detailed scene export
timing log
2.4: renders MaterialX shader trees from the MaterialXSI addon (converted to OSL). Note: OSL shading works on CPU render devices only
2.3.x: Cycles 4.5, OSL support is back, new Metallic BSDF and Set Normal nodes, phase function
for Scatter Volume, Diffuse Roughness for Principled BSDF, more Noise Texture types,
subdivision with motion deform, per-frame texture images, rendering of NURBS surfaces
and curves (via custom properties), tile rendering, fixed shadow catcher, vector input
ports for OSL shaders
2.2.x: nodes of Blender 4.3 (Ray Portal BSDF, Sheen BSDF, Gabor Texture, redesigned Principled
BSDF), current Blender OCIO color profiles, custom velocity grids for VDB primitives,
Particle Info node fed by ICE attributes, denoising of the final passes with OIDN
or OptiX
Supported Softimage features (quoted from the download page):
Polygon meshes and hair geometry
Texture coordinates
Vertex colors
Shaderball preview. For materials, shader nodes and texture nodes
Basic limited support of the following built-in Softimage shader nodes: Phong, Lambert,
Hair Shading, Image, converters between vector, color and scalar
Ambience global environment light
Limited support of built-in Softimage light sources
Model instances
ICE strands geometry
ICE pointcloud instances
ICE geometry attributes (vector, color and scalar) with context per-point and per-object
Volume rendering. In particular supports emFluid, Explosia FX and openVDB for Softimage
volumes
Special VDB Primitive for rendering vdbs without ICE
Output multilayered exr file with all rendered passes
Rendermaps
The following features from Cycles itself are supported:
CPU and GPU rendering. In particular multidevices are supported. This allows you to
use cpu and gpu simultaneously. The libraries for GPU rendering are included in the
package.
All Cycles shader nodes
OSL shaders
OpenColorIO profiles (Blender profile included)
All Cycles output passes (Combined, Depth, Normal and so on)
Color and value shader AOVs
Lightgroups
Cycles camera properties, in particular all panorama modes
Cycles light sources
Denoising by using Open Image Denoise and OptiX denoiser
For more information, full documentation and a list of the available Cycles nodes
see the download page linked below. There is no local backup because the addon is
still frequently updated - the plugin can be downloaded on Shekn's github releases. The source code is available on github there as well.
News concerning 3D DCC business
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MKXSI
- Posts: 63
- Joined: 13 Feb 2019, 15:27
Post
by MKXSI » 29 Oct 2019, 14:39
Hi again, i managed to get rid of the fireflies, in fact, i forgot hit + to subdivide object...
Any clue why is this happeing? Render not using all cores even i put fixed cores to 64 on settings....
Rendering image is 3200*1800 btw...
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wireframex
- Posts: 425
- Joined: 08 Jun 2009, 21:02
- Location: France
Post
by wireframex » 29 Oct 2019, 17:17
Render Cores used with Cycles for Softimage
I often use between 400-600 AA samples and internal cycles denoising or FX Denoise (
https://ssoftadd.github.io/fxDenoisePage.html)
Phil
"without mastery, power is nothing" - Softimage Addict User
CPU 3990x 128 Threads / 2 x 3090 RTX - 24 Go / 96 Go memory
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jonmoore
- Posts: 153
- Joined: 30 Jul 2016, 16:18
Post
by jonmoore » 29 Oct 2019, 17:50
@wireframex What do you think of the Intel denoiser? I haven't installed it yet but wondered how it compared to something like Nvidia's denoiser,which is great for look-dev but loses too much high frequency detail for finals (and is obviously impossible to use on animation sequences). What I've found with denoisers so far, is that only Altus and the main denoisers in Arnold, RenderMan and V-Ray can be used for production.
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wireframex
- Posts: 425
- Joined: 08 Jun 2009, 21:02
- Location: France
Post
by wireframex » 29 Oct 2019, 18:01
FX Denoise is not bad at all I like the fact it works inside SI and its free

"without mastery, power is nothing" - Softimage Addict User
CPU 3990x 128 Threads / 2 x 3090 RTX - 24 Go / 96 Go memory
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MKXSI
- Posts: 63
- Joined: 13 Feb 2019, 15:27
Post
by MKXSI » 30 Oct 2019, 07:38
Could you please try to render a big resouliton image at 3200 * 1800 a see what happens?
Thanks
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wireframex
- Posts: 425
- Joined: 08 Jun 2009, 21:02
- Location: France
Post
by wireframex » 30 Oct 2019, 18:29
With your rendering resolution I have more or less the same result as you.
Try to play with the tile size ...
Phil
"without mastery, power is nothing" - Softimage Addict User
CPU 3990x 128 Threads / 2 x 3090 RTX - 24 Go / 96 Go memory
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MKXSI
- Posts: 63
- Joined: 13 Feb 2019, 15:27
Post
by MKXSI » 31 Oct 2019, 07:41
Ah mon ami, i feel more tranquilo now. is this maybe some bug to fix i a new version? Thanks for trying for me 16x16 worked the best, but it still at 70% of CPU speed.
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Shekn
- Posts: 254
- Joined: 30 Dec 2016, 19:18
Post
by Shekn » 31 Oct 2019, 13:16
It looks like a bug from original Cycles side. We can only hope that Cycles developers fix it (or it already fix in the current version). In any case, later I will update Sycles with the latest version of the Cycles.
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MKXSI
- Posts: 63
- Joined: 13 Feb 2019, 15:27
Post
by MKXSI » 31 Oct 2019, 13:31
Thanks Shekn
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wireframex
- Posts: 425
- Joined: 08 Jun 2009, 21:02
- Location: France
Post
by wireframex » 31 Oct 2019, 18:34
Shekn wrote: 31 Oct 2019, 13:16
It looks like a bug from original Cycles side. We can only hope that Cycles developers fix it (or it already fix in the current version). In any case, later I will update Sycles with the latest version of the Cycles.
Good news thanks a lot
"without mastery, power is nothing" - Softimage Addict User
CPU 3990x 128 Threads / 2 x 3090 RTX - 24 Go / 96 Go memory
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yashugan
- Posts: 115
- Joined: 30 May 2012, 18:58
Post
by yashugan » 16 Nov 2019, 12:34
https://gyazo.com/6e9ae4256d43b3445e7c77e5ac6df953
Image up here:
Apologize me, but i can't find anymore GPU -CPU options... where are now? i'm using 1.8.1. thank!!!!!!!!!!!!
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wireframex
- Posts: 425
- Joined: 08 Jun 2009, 21:02
- Location: France
Post
by wireframex » 16 Nov 2019, 21:02
Hi,
No pb here with 1.8.1 Nvidia Driver 441.08
Try to uninstall the Sycles_1.8.1 add-on from the Softimage menu file the have a look to your c:\Users\xxxxxx\Autodesk\Softimage_xxxx\Addons\ and remove the sycles directory.
Then install it an other time.
On some machines the addon additionaly requires vc14 runtime. Download the Visual C++ Redistributable for Visual Studio 2015 package from here and install it (or google by keywords "vc14 runtime").
Phil
"without mastery, power is nothing" - Softimage Addict User
CPU 3990x 128 Threads / 2 x 3090 RTX - 24 Go / 96 Go memory
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yashugan
- Posts: 115
- Joined: 30 May 2012, 18:58
Post
by yashugan » 17 Nov 2019, 08:33
Thank you!!!!!!!!!!!!!!!!!!!!!!!!
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Shekn
- Posts: 254
- Joined: 30 Dec 2016, 19:18
Post
by Shekn » 17 Nov 2019, 11:12
The Device section should be in parameters in any case, even if the Cycles does not find any device for render. Old versions of the Sycles does not have device parameters. If you save a scene with old version of the Sycles, then update addon and open this scene again, then the PPG of the render parameters will be old and does not contains new settings. This is Softimage behaviour. It seems that yashugan's screen demonstrate this.
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wireframex
- Posts: 425
- Joined: 08 Jun 2009, 21:02
- Location: France
Post
by wireframex » 17 Nov 2019, 12:23
Shekn wrote: 17 Nov 2019, 11:12
The Device section should be in parameters in any case, even if the Cycles does not find any device for render. Old versions of the Sycles does not have device parameters. If you save a scene with old version of the Sycles, then update addon and open this scene again, then the PPG of the render parameters will be old and does not contains new settings. This is Softimage behaviour. It seems that yashugan's screen demonstrate this.
Good to know.
"without mastery, power is nothing" - Softimage Addict User
CPU 3990x 128 Threads / 2 x 3090 RTX - 24 Go / 96 Go memory
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opoppopopp
- Posts: 213
- Joined: 16 Jun 2009, 04:23
Post
by opoppopopp » 28 Nov 2019, 21:43
Sorry if I miss something
But "skip rendered" not working? I think It is belongs to scene option, independent of which renderer is used...