You mean GI from the "Effect" list in the render settings?
That's a C4D option, it does nothing for CentiLeo. CentiLeo does its own GI.

I don't think any of those effects would do anything. They don't anything for other 3rd party engines either, they're just for the C4D built-in engine.

And for lights, be sure to create them from the CentiLeo menu so they get the tag added to them. Don't just create regular C4D lights.


And I think only the type of light and intensity have any effect in CentiLeo. Even for the type of light, not all are supported.

Yeah, I can see something, but there really shouldn't be. I don't know what's going on.

That subtle change is not really GI. Do you have that difference when using the IPR too? I'm thinking C4D might just do something on top of the CentiLeo rendered image when you render to the picture viewer.

If you want to see CentiLeo without GI set the "Clamp Indirect" to 0.

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Filip Stamate wrote: And for lights, be sure to create them from the CentiLeo menu so they get the tag added to them. Don't just create regular C4D lights. And I think only the type of light and intensity have any effect in CentiLeo. Even for the type of light, not all are supported.

Filip, you have found it right. I can add that not all light types from C4D are supported, the only supported light types are:
1) Omni. It's a point light source. And in CentiLeo light tag a shape radius can be changed to make a sphere from it. Normalise intensity option in the tag can fix the intensity while you change the shape size.
2) Spot light. It supports only the spread angle from C4D settings and CentiLeo light tag options of course.
3) Infinite light (same as parallel/directional) + Centileo tag
4) Area light source (with Rectangle shape) + Centileo tag
5) The light portal to accelerate GI coming to the room through the windows. To enable it just create Area Rectangle light type and check "Is Portal" option in CentiLeo light tag. It accelerates the lighting noise reduction for Sky + Environment tag (HDRI) and for Infinite lights too.
6) The other shapes of lights can be created using any other C4D geometry object, even with displacement coming from CentiLeo material. But you have to apply CentiLeo Emission material to it, it's having more and more settings as CentiLeo light tag.

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Filip Stamate wrote: That's one reason why having custom light objects would be better than using the C4D lights. It's too confusing.

Sure I think about this but need to prioritize other things at the moment. After certain technology stage is reached (soon!) there will be a lot of dedicated work to improve user experience related to C4D integration

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Leo Allan wrote: Make sure to have youe CentiLeo Light source have the centileo light source tag. Furthermore, you can edit the overall multiplier and the gamma settings to change the level of light.

Exactly, however these tags are added automatically if the light source is created using CentiLeo menu available at the top line of C4D menu.

Yes, it's true finding. Actually this is very easy to do, but I was lazy in this part of work However it's possible to do all these shapes using any shape of regular object and applying an emissive material for it.

You can use any kind of Cinema 4D object of any complexity and apply emission material to it using any number of textures. There is "Importance sampling" option there and it's better to enable it when the lighting effect is global for the scene, i.e. it illuminates quite a lot. Or disable this option when the illumination is local and not influencing other objects too much.