Texture Emission

[simsen]

Hello,
I want the texture to emit on both sides of a meterial. Does anybody know how to do that ? ( double sided is activated on the modo's native material)

thanks

[face_off]

The emission will be in the direction of the polygon normal - the "double sided" property of the Modo material is ignored. I suggest using two identical polygons in the same space with normals pointing in opposite directions, or use a cylinder, cube or sphere as an emitter (if you convert a Modo Point Light to an emitter with the plugin, it will automatically use sphere).

Paul

[simsen]

Ok,thanks Paul!

[LFedit]

So is an IES light better off being applied to like the cube with spherical projection that the point light converts to? Or is an IES light better applied to a plane?

Thanks

[face_off]

So is an IES light better off being applied to like the cube with spherical projection that the point light converts to? Or is an IES light better applied to a plane?

If you use cube - I suspect the IES light will illuminate from each polygon (but I am not 100% sure on that). For example, if you have a cube as an emitter, and use Spherical Projection on the Distribution, and set Coordinate Space to Normal, you will get light from each side of the cube.

So in answer - if you just want one beam of light when using Normal Space - use a single polygon plane.

Paul

[LFedit]

Ahh this explains why I am probably not getting my cool light effects from my IES lights, only just the bottom beam mostly. But I want to catch the cool lights on the wall. I will try like a half sphere, do you know what is a safe number of polygons for something like that?

EDIT: But how come if I create a IES light in modo, then use the "Create Octane Emitter" it converts to a plane and not a sphere?

Thanks

[LFedit]

Yeah something isn't making sense here. On the left is the ies light I made just using modo, and looking in the modo preview window. Then on the right is the same IES file applied to a half sphere. I have it set with a circular projection and also have it set to normal space. Can see the light is working right in modo, but in octane it is acting funny. Like it is projecting over and over from each surface.

If I try to convert the IES light made in modo by just hitting the Create Octane Emitter button, it will just make a plane that points at the wall and isn't anything like it either.

Thanks, and sorry if I am just missing something.

[face_off]

Can see the light is working right in modo, but in octane it is acting funny. Like it is projecting over and over from each surface.

That's exactly what is happening - and it probably the intended functionality (you will need to check with Otoy in the Octane Standalone 2.12.1 thread to confirm this.

If I try to convert the IES light made in modo by just hitting the Create Octane Emitter button, it will just make a plane that points at the wall and isn't anything like it either.

Only Modo Photometric lights will convert to a Modo emitter with an IES distribution - and in this case, a single plane emitter will be created to apply the emission material to.

In summary - use the Create Octane Emitter button on in the Modo light properties to setup the emitters, and it should match the Modo light.

Hope that helps.

Paul

[LFedit]

Sorry I am not following you here.

In the left image I duplicated the same exact Photometric Light in modo. Then I selected the right one and simply clicked, "Create Octane Emitter" in the Photometric Light properties.

Then in Octane (On the right) it just created a plane, and it is pointing away from the wall.

I just want my lights in Octane, to look like the modo ones... the modo ones are projecting correctly. I will post this in the standalone forum as well.

Thanks

[face_off]

Hi - sorry - I am not following you here.

The workflow is....create a Modo Photometric light in Modo, click the Create Octane Emitter, and the appropriate Octane geometry and emission material should be created. Is this is not happening - can you pls send me the Modo scene with the Photometeric light and I will take a look.

Paul