Custom Realistic Lense

[interelectronix]

Is it possible to build custom Realistic Lens presets ?

[skientia]

Lens "bokeh" (out of focus aesthetic) is user-customizable via the Octane's Universal Camera (Thin Lens). Here's an introductory page (under overhaul).

This is a still from the video available on the suggested link. Modern to "vintage" lenses are achievable with solely the Universal Camera.


Furthermore, 2024.1 introduced a new camera designated as "Photographic lenses", the look-controls are near non-existant since it is a hardcoded simplified implementation of real lens optical design / models (the list contains the names).

Project files and assets on the website will be made available for download once updated.

[skientia]

In fact, several ORBX files will be made available, the project files with assets as well as a list of virtual cameras / lens presets.

[interelectronix]

Does that mean the Realistic Lense is "only" the Universal camera with predefines presets ?

[skientia]

Does that mean the Realistic Lense is "only" the Universal camera with predefines presets ?

Good question.
Short answer and assumedly, no.

It doesn't appear to be,
until a developer or team member disclose that information,
it is seemingly a manual implementation of the listed reference of distinctive optical designs.

The Universal Camera features (more than) enough options to get close but unlikely to match 1:1 (which, if so, would affirmatively answer the question).

The listed lens references (optical design) are more sophisticated than what the already-impressively-sophisticated Universal Camera options provide.

It's as close as the physical lens it can get,
minus the results of coating + internal reflections (flares, veiling glare, MTF, thus contrast, and other optical properties).

PS: the "Realistic Lenses" feature a "ray-traced" Chromatic Aberration single-slider parameter.

[interelectronix]

I dug a bit in the code and it really looks like the lenses are hardcoded into the binary and no parameters are accessible anywhere.

I was hoping that the final implementation would end up like the lens sim plugin https://superhivemarket.com/products/lens-sim

where you can replicate the lense stackup and you are good. Lense stackups are quite available https://www.photonstophotos.net/General ... lBench.htm

I would also appreciate Otoy build a bit more on the amazing user base. There are so many talented people - like you - that are contributing so much and user generated lenses would be amazing. I don´t get it why they are not tapping into this potential.

I tried to rebuild a few Canon Prime Lenses and the results are nothing to get excited about.

I tried to collect many parameter by ChatGpt but still very early work in progress and nothing is really checked just a very quick test with the 35mm parameters.
The optical vignetting is quite puzzling because it behaves somewhat strange.

Any comments appreciated

PS: Yes I saw the chromatic aberation slider and I love it.

Markdown

| Parameter | EF 24mm f/1.4L II | EF 35mm f/1.4L II | EF 50mm f/1.2L | EF 85mm f/1.2L II | EF 135mm f/2L |
|----------------------------|-------------------|--------------------|----------------|--------------------|----------------|
| Camera Mode | Thin lens | Thin lens | Thin lens | Thin lens | Thin lens |
| Spherical Distortion | 0.00 | 0.00 | 0.05 | 0.08 | 0.00 |
| Barrel Distortion | 0.10 | 0.05 | 0.00 | 0.00 | 0.00 |
| Barrel Distortion Corners | 0.05 | 0.03 | 0.00 | 0.00 | 0.00 |
| Spherical Aberration | 0.08 | 0.05 | 0.10 | 0.12 | 0.04 |
| Coma | 0.04 | 0.02 | 0.05 | 0.07 | 0.01 |
| Astigmatism | 0.02 | 0.01 | 0.02 | 0.04 | 0.01 |
| Field Curvature | 0.10 | 0.08 | 0.05 | 0.06 | 0.02 |
| Autofocus | Yes | Yes | Yes | Yes | Yes |
| Focal Depth | 0.80 | 1.20 | 1.50 | 2.00 | 2.80 |
| Aperture | 0.71 | 0.71 | 0.58 | 0.58 | 0.71 |
| Aperture Aspect Ratio | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
| Aperture Shape | Polygonal | Polygonal | Polygonal | Polygonal | Polygonal |
| Aperture Blade Count | 8 | 9 | 8 | 8 | 8 |
| Aperture Edge | 0.90 | 0.85 | 1.00 | 1.00 | 0.95 |
| Aperture Rotation | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Aperture Roundedness | 0.85 | 0.90 | 0.80 | 0.75 | 0.85 |
| Central Obstruction | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Notch Position | -1.00 | -1.00 | -1.00 | -1.00 | -1.00 |
| Notch Scale | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 |
| Custom Aperture | None | None | None | None | None |
| Optical Vignette Distance | 0.015 | 0.020 | 0.020 | 0.025 | 0.010 |
| Optical Vignette Scale | 1.10 | 1.03 | 1.20 | 1.30 | 1.10 |
| Split-focus Diopter | Yes | Yes | Yes | Yes | Yes |
| Diopter Focal Depth | 1.05 | 1.10 | 1.12 | 1.15 | 1.20 |
| Diopter Rotation | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Diopter Translation X | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Diopter Translation Y | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Diopter Boundary Width | 0.60 | 0.55 | 0.60 | 0.70 | 0.65 |
| Diopter Boundary Falloff | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Show Diopter Guide | No | No | No | No | No |