How can i export only curvature and occlusion maps?

[pedro8999]

How can i export only curvature and occlusion maps?

[Carlosan]

File > Export > Objects & Textures

All this info is detailed in the Online Manual

https://3dcoat.com/documentation/

[pedro8999]

4 hours ago, Carlosan said:

File > Export > Objects & Textures

All this info is detailed in the Online Manual

https://3dcoat.com/documentation/

Like this is okay? when i click add texture and then i click RGB i cannot find any curvature name, only cavity, is cavity same as curvature?

[pedro8999]

6 minutes ago, pedro8999 said:

Like this is okay? when i click add texture and then i click RGB i cannot find any curvature name, only cavity, is cavity same as curvature?

or which one should i choose from the export preset list, i couldn't find one that has CURVATURE

[Carlosan]

Is cavity same as curvature ?

yes and no.

A curvature map is a texture that stores the convexity/concavity of the mesh. Also called Concavity, Convexity, Pits & Peaks, Worn Edge. 

On curvature RGB map each channel contains different information, like convexity in red and concavity in green for instance.

 

A 'Cavity map' is essentially a more detailed Ambient Occlusion map and is sometimes called 'crevice map'.

You might have also heard the term "Curvature Map". A curvature map actually store the concave and convex edges of a mesh. 

 

However 'Cavity map' is different than 'Curvature Map.

To produce a cavity map, we need more gray-scale values so that we can identify the convex (white), the concave (Black) and the transition between peaks and crevices (gray values) of the model. 

 

Starting from 3DCoat 2021.53 the RGB cavity was introduced as the default calculation method in Texturing.  You can active RGB Cavity "Curvature" on Edit > Preferences > Tools

Adjusting Cavity Area Width and Overall Cavity Modulator can give you some nice effects like several layers of old paint on top of each other. 

 

- Cavity Area Width:

In the Smart Material Editor. Appears in the Editor when RGB Cavity is selected as default.

* Delete your old Grey Curvature layer first.

When you first run the Curvature using RGB Cavity, the Light Baking Panel comes up. Not change the settings -you can change some later-. Do not change (Local Curvature RGB) and run the Curvature Calculation. 

 

- Smart Material: 

Adjusting Cavity Area Width and Overall Cavity Modulator can give you some nice effects like several layers of old paint on top of each other. 

 

- Just a fast Simple example:

Base
First layer = Old Copper
2nd layer = Blue paint
3rd layer = Red paint.

Adjust each smart material differently using Adjusting Cavity Area Width and Overall Cavity Modulator.

[pedro8999]

33 minutes ago, Carlosan said:

A curvature map is a texture that stores the convexity/concavity of the mesh. Also called Concavity, Convexity, Pits & Peaks, Worn Edge. 

On curvature map each channel contains different information, like convexity in red and concavity in green for instance.

Adjusting Cavity Area Width and Overall Cavity Modulator can give you some nice effects like several layers of old paint on top of each other. 

A 'Cavity map' is essentially a more detailed Ambient Occlusion map and is sometimes called 'crevice map'... You might have also heard the term 'Curvature Map. However 'Cavity map' is different than 'Curvature Map... A curvature map actually store the concave and convex edges of a mesh. 

To produce a cavity map that we could use as Curvature, we need more grey-scale values so that we can identify the convex (white), the concave (Black) and the transition between peaks and crevices (grey values) of the model. 

Starting from 3DCoat 2021.53 the RGB cavity was introduced as the default calculation method in Texturing.  You can active RGB Cavity "Curvature" on Edit > Preferences > Tools

 

- Cavity Area Width:

In the Smart Material Editor. Appears in the Editor when RGB Cavity is selected as default.

* Delete your old Grey Curvature layer first.

When you first run the Curvature using RGB Cavity, the Light Baking Panel comes up. Not change the settings -you can change some later-. Do not change (Local Curvature RGB) and run the Curvature Calculation. 

 

- Smart Material: 

Adjusting Cavity Area Width and Overall Cavity Modulator can give you some nice effects like several layers of old paint on top of each other. 

 

- Just a fast Simple example:

Base
First layer = Old Copper
2nd layer = Blue paint
3rd layer = Red paint.

Adjust each smart material differently using Adjusting Cavity Area Width and Overall Cavity Modulator.

i read everything you answered me but still i am confuse, in my 3dcoat  Edit > Preferences > Tools has already  RGB Cavity activated . I already calculate the curvature before doing all the texturing of my model, i have the cavity layer in the layers. But still, when i go to export textures and then i click add texture i cannot find any "curvature". only cavity... Curvature option like the one appears in your screenshot in your first comment in this post doesn't exist ( i am using 3dcoat 2024_30 ) i went ahead and exported cavity... it looks like a curvature map.... can i use that one as a curvature?

 

[Carlosan]

Select Cavity for Curvature, (the map generated is Cavity at export). 

Cavity textures focus on small details, while curvature textures emphasize the overall shape of a surface.
Curvature map actually store the concave and convex edges of a mesh.

The convex (white), the concave (Black) is the Curvature Map, and the transition between peaks and crevices (grey values) of the model is the Cavity Map. 

- Cavity texture
Focuses on small details like crevices, grooves, and indentations. Cavity maps are also known as crevice maps. They are a more detailed version of ambient occlusion maps. Cavity maps can be useful for improving dirt masks, enhancing colors, and adding highlights. 

- Curvature texture
Focuses on the overall shape of a surface, showing where the surface curves inward or outward. Curvature maps are also known as concavity, convexity, pits and peaks, or worn edge. Curvature maps can be used to simulate edge wear, highlight details, and check for surface continuity. 

[Carlosan]

Curvature can be both an RGB map encoding convexity/concavity in separate channels, or a grayscale map encoding convex edges as white and concave edges as black like in the image above.

This map is often (erroneously) called Cavity, but more accurately a Cavity map can also be a white map with concave edges encoded as black.

 

3DCoat does not have the option to export both maps at the same time, but you can generate them using the Generate Curvature map tool.

Read the tip

 

Pay attention that curvature consists of two components:

- First is local curvature that allows to detect small details, scratches.

- Second is long - range curvature that flows smoothly and allows to detect large details.

 

- If you need Gray Maps set intensity for both types: curvature or cavity.

Turn intensity up create a cavity map. (curvature intensity 400, long range curvature 10)

Turn intensity down create a curvature map. (curvature intensity 8, long range curvature 100)

 

Or use Local Curvature RGB for Cavity map.

 

And Local Curvature for Curvature map

 

So you can get this result: