Tag Archives: modellazione in blender

Sharing is caring: VisitLab 3D models free on BlendSwap

During the last few months, VisitLab has started to share on Blend Swap some of the 3D models realised for the projects.
Until now, 5 items were shared:

white board

Etruscan lopas

breakfast table set

  • and an assembly line with 4 different machines suggesting the performance of archaeological analysis with X ray; thermoluminescence; carbon dating; chromatography

assembly_line

All these models were created for the short educational movie Ati e la paleodieta mediterranea


If you are having problems, please use this link

created for Isabella d’Este Virtual Studiolo

More models will come. So, stay tuned!

How to: a sealing wax stamp animation in Blender


If you are having problems, please use this link

In this tutorial you are going to discover how to:

  • use fluids for dropping sealing wax
  • manually animate the spreading of the wax
  • use modifiers to impress a seal
  • define a realistic wax effect

seal

Are you longing to get a result similar to the one presented in our demo video?
If we have managed to put up a good tutorial, you should be able to. Otherwise, contact us, and we will apologize for our poor communication skills.
Let us start.

Drops

First of all we created 3 UV spheres with different size and shape. One of the spheres was a little bit sculpted in order to modify its shape. Selection_001The fluid coming from the spheres is initialized with three different starting speeds. The first and second wax drops move a little bit up, along the Z, before going down. In this way, we simulate a diachronic fall.
(A possible solution with a movement of the spheres in the domain was discarded as deemed unsatisfactory)

Selection_003

Plane

The plane is set as an obstacle. Its parameters are shown in the image (no slip). Both plane and spheres are Fluid (physics)

Selection_002

Fluid

  • In order to simulate the wax density: base 2, exponent 3 in the viscosity parameters
  • For avoiding excessive spreading of the wax on the paper: Slip type -> no slip
  • To obtain a Slow motion effect: Speed 0.3
  • After several attempts we discovered that the parameter that suited us better for the Real World Size is 0.4 meters for the domain
  • To obtain a wax-style fluid Smoothing is set at 4

Selection_004

Bake a test simulation with a final resolution of 100-150 to see if there is something wrong. When you get a first result of the wax spreading correctly, bake the definitive version with a final resolution of 200-400.

Selection_005

Now that the wax is on the paper we want to smooth it even more, so we add a Corrective smooth modifier with parameters:

  • Only smooth
  • Factor between 1-1.2
  • Repeat at 50-80

Selection_006

When the simulation slows down, stop the animation (for example at frame 220) and duplicate the wax object. Press “Esc” for keeping it still and put it on another layer. To fix the copy and transform it into a mesh with that shape, apply the Fluidsim modifier.

Selection_007

For your convenience, re-name the two objects. We named the first one wax-sim and the second one wax-fixed.

Swapping the two wax objects

In order to swap the two objects during the animation, you have to animate the visibility.

  • Place yourself where you stopped the animation earlier. In our case, at frame 220.
  • Select object n. 1 (wax-sim).
  • In the outliner, animate visibility and rendering as enabled by placing the mouse cursor on each relative symbol and clicking on the “i” key.
  • Go to frame 221, disable them and animate as before (mouse cursor on and “i” key)

In order to show the second object (wax-fixed):

  • Go back to frame 220
  • Animate visibility and rendering as disabled.

Selection_008

  • At frame 221 enable and animate them. That is, make the opposite of the previous steps

Selection_009

Here is a GIF presenting the entire process for swapping the objects.

animate_visibility

Refinements with Shape keys

For concealing the swap between a moving fluid object and the static wax one we used a couple of shape keys, a suitable tool for giving the final touch to the shape of the wax drop.
In order to work on the real mesh, the corrective smooth modifier is temporarily reduced from a factor of 1.2 to a factor of 0.01.
Hence, for smoothing by hand the surface and give a faint persistency of the spreading effect, two shape keys are created: smooth and grow.

Selection_012

Selection_014

Shape key smooth – for reducing the roughness of the surface without the use of the Corrective smooth modifier, we can use sculpt with the smooth brush.

Shape key grow – by using the sculpt tool the shape of the drop is a little bit enlarged and rounded off, for simulating the last phases of the spreading of the wax on the surface. For this aim, a wide enough grab brush will do the job.

shape key grow

shape key smooth

Once this phase is concluded, we can take the corrective smooth modifier back to a factor of 1.2.

Animation of shape keys

It is time to animate the two shape keys in opposition to the corrective smooth modifier by gradually reducing the modifier(from 1.2 to 0.01) while increasing the shape keys grow and smooth (from 0 to 1).
This animation starts for us at frame 221
Selection_016
The animation of the shape key grow will last longer in comparison to the transition occurring between corrective smooth and shape key smooth.
Selection_015
When the transition of the corrective smooth is concluded, by reaching a factor of 0.01, the displace animation starts, in the picture from frame 271 to 310.

Impress the seal

For the displacement animation we activate 3 modifiers:

  • Subdivision surface (with levels as shown in the image);
  • Displace (important is the creation of an empty for correctly positioning the seal in the displace);
  • Subdivision surface (again).

Selection_018

At this point, animate the strength from 0 to 0,025.
Be careful with the Subdivison levels in the view because the mesh will be very heavy.

Textures

The texture is in black/white and the levels of gray define the height of the displacement relief.
For simulating the shift of the wax due to the impression of the seal, these levels are higher (i.e. whiter) near the border of the seal and soften towards a slightly darker shade of gray in the area beyond.

Shader

In the image, the configuration for the shader “wax”:

Selection_019

For this tutorial we used the first seal we stumbled upon (and not one of Isabelle d’Este, for which video-trailer we have this wax sealing impression done).
It happened to be from a Football Club and we hope no one will consider it as a precise stance of our Laboratory.

If you will have problems in following our tutorial, please leave your comments below and we will try to help.

Invasione!!!

Dal 7 settembre, e per un mese, 15 meritevoli ed entusiasti ragazzi del Liceo Cagnazzi di Altamura saranno insieme a noi per imparare a modellare in 3D con la tecnica della fotogrammetria e conoscere un po’ più da vicino il rutilante mondo della Virtual Cultural Heritage.
Il progetto “Odisseo 2, museo laboratorio delle scienze” è stato sostenuto dal Fondo Sociale Europeo attraverso la Regione Puglia.

Liceo Cagnazzi Progetto Odisseo

Ce la faranno a sopravvivere o si perderanno nei meandri della computer grafica?

Virtual Theatre Cineca

Vedremo..

Intanto diamo loro un caloroso benvenuto!

Ati conquista la sua prima copertina

La rivista Archeomatica omaggia Ati con la copertina del numero di Giugno 2015

Archeomatica_2_2015_copertina-300

A quando la nostra Ati su Vanity Fair e Time?

Workflow di produzione di una scena di Experience Etruria: CG in riprese dal vivo

Dopo tanti giri a caccia di belle riprese, in questo video mostriamo il flusso di lavoro in Blender per la creazione di una scena di Experience Etruria. Le riprese dal vivo vengono finalmente integrate con elementi di computer grafica.


Se non vedete il filmato potete usare il seguente link

Il video mostra come sulla ripresa dal vero sia stato eseguito il motion tracking (0’05”) e settata la camera con il track (0’09”). Gli oggetti della scena sono stati ricostruiti in 3D in fotogrammetria a partire dal filmato stesso (0’16”) e fatti coincidere a mano con il movimento camera. E’ stata quindi inserita Ati nella scena (0’23”). L’ambiente è stato editato mediante l’uso di nodi (0’34”) e gli elementi 3D ricostruiti sono serviti sia per proiettare le giuste ombre su Ati sia per collocarla ma, soprattutto, per mascherare le parti di Ati che nella realtà sono coperte da oggetti (1’18”).

Infografica di “Ati alla scoperta di Veio”

Che Ati fosse un fiore già lo sapevamo; adesso, grazie all’infografica realizzata da Daniele, ne abbiamo la certezza.
L’infografica mostra la lavorazione tecnica del cortometraggio di animazione “Ati alla scoperta di Veio”, creato nel VistLab di Cineca tra il 18 Marzo 2013 ed il 20 Ottobre 2014.

A partire dai dati dei log di produzione è stata creata questa rappresentazione animata:
le persone coinvolte sono identificate con il nome utente, le linee rappresentano le cartelle di sistema ed i pallini generati sono file, ogni modifica o creazione tramite Commit SVN dei files è un fascio di luce.

Notate i fantastici fiori fucsia che si aprono ad un certo punto sulla lavorazione delle trecce di Ati.


Se non vedete il filmato potete usare il seguente link

Questa è la lavorazione nel dettaglio (10 minuti):
Se non vedete il filmato potete usare il seguente link

Simulazione creata con Gource a partire dai log SVN

Impostazioni Gource:
1 giorno = 0.1 secondi
Skip immediato se non avviene nulla
Nessun limite per numero di file visibili
Nessuna scomparsa file

Blenderisti entusiasti di ritorno dalla presentazione di Ati alla BC2014

Come si capisce bene dalle magliette indossate da Silvano e Daniele, per il blenderista entusiasta persino andare in bagno è una perdita di tempo e non è perciò contemplata tra le attività della giornata!

Blenderisti entusiasti

Ati sarebbe fiera di tanta abnegazione!

Blender Conference 2014

Anche quest’anno Daniele e Silvano avranno modo di raccontare alla Blender Conference un po’ di ciò abbiamo combinato grazie all’uso intensivo di Blender.

Peccato che per la data di accettazione alla conferenza ancora non erano state realizzate le mirabilie per lo spettacolo del Sarcofago degli Sposi e si dovranno accontentare di parlare “solo” di Ati, The maid with braids.

Ati_shot-04_08