C4D Scuplt maps -> Octane

[Delphis]

Hi,
Is it possible to use baked maps from c4d sculpt mesh and replicate same results you get with c4d standard material/render in octane material/render?
I can't get it right
Simplified example of workflow:
make cube, go to sculpt layout, subdivide few times, sculpt, bake maps (AO,normal,displacement)

Thanx.

[atome451]

Hi,
I think you ask too much to the Octane's displacement. Cinema 4D has access to the information of the internal smoothing system of the sculpt subdivision module. The displacement channel of Cinema 4D renderer is then adapted to the sculpt baking. This is not the case of Octane then you should give a little bit more informations by baking your sculpt from a higher level than zero with "keep higher level" checked (by sample level 3 or 4).

I think the baking result is far better with my old Mudbox 2011 than with my old Cinema 4D R14, probably because even with a higher level mesh the C4D smooting is still a problem. Maybe it's better with a newer release of C4D, i don't know. And Octane seems to handel curioustly 32 bits floating point files (i'm unable to restore negative values of the file, only positive values) then i've found the result is far better with 16 bits files "centered" at this time.

Sorry for my poor english. Here a sample from Mudbox in C4D:

Here a screen capture of the Mudbox sculpture:

[atome451]

I've pushed my tests a little bit further. I've seen i've made some mistakes in my previous post.

The 32 bits centered file generated by Cinema 4D works in the same way than 16 bits. Both are in RGB an could be converted in grayscales to spare memory because Octane only uses red channel for RGB files, then the result wil be the same.

The main difficulty isn't the file format but the hard edges generated by the sculpting baking of Cinema 4D in some circumstances. The result is a little bit better if you keep a higher level than level zero for the base mesh and create a better UV map from this base mesh. As Octane doesn't use Object projection (XYZ as RGB) but intensity (without information of direction), the baking from C4D isn't a "one push button".

Here a sample of hard edges generated by C4D baking

I don't know why but these hard edges doesn't generate cracks in C4D renderer

Of course, these hard edges generate errors in Octane...

[radiantstudios]

Slightly off topic regarding C4D Sculpting using Octane. When using a Sculpt Brush Tool, Octane only seems to update the mesh on the first brush stroke. Subsequent strokes don't update the mesh unless I resend the scene. Is this the current state of Octane regarding Sculpt or is there a way to correct this so it updates correctly.

Cheers, Steve

[aoktar]

Slightly off topic regarding C4D Sculpting using Octane. When using a Sculpt Brush Tool, Octane only seems to update the mesh on the first brush stroke. Subsequent strokes don't update the mesh unless I resend the scene. Is this the current state of Octane regarding Sculpt or is there a way to correct this so it updates correctly.

Cheers, Steve

Do you have a Octane object tag on this object?

[radiantstudios]

Yes it has a Tag, but it will only update the first stroke of the brush and not subsequent strokes. The only way it will recognize the next stroke of the brush is to resend. Tried different mesh numbers, but still no luck.

[aoktar]

Yes it has a Tag, but it will only update the first stroke of the brush and not subsequent strokes. The only way it will recognize the next stroke of the brush is to resend. Tried different mesh numbers, but still no luck.

I remember it. i think that it cannot generate a update message we can catch it. I'll test it anyway once again.

[radiantstudios]

Changing the subdiv level in sculpt layer updates the mesh, but again i'd sometime get 1 stroke update sometime none. On one occasion i got more than 1 stroke. Tried swapping the Tag order but that makes no difference.

[radiantstudios]

Anymore news on sculpting with Octane not updating the sculpt mesh after the first brush stroke?

Cheers
Steven

[aoktar]

Anymore news on sculpting with Octane not updating the sculpt mesh after the first brush stroke?

Cheers
Steven

There is not any method to detect the updates in C4D sdk. But i'll try to implement a indirect approach for this.