Fluid simulation in Blender 2.80

By Pavel_Blend

What is this article about?

In this article, I will talk about the fluid simulator in Blender 2.80. This simulator was first added to the blender at the end of 2005, in version 2.40. Since then, it has not changed significantly (the changes were mainly in the beginning, after the introduction of the blender). The simulator code was written by a third-party developer Nils Thuerey. He wrote a fluid simulation library and named it El’Beem. The engine is voxel-based on the method of lattice Boltzmann equations. It is best suited for creating water, but it has the ability to create viscous liquids (honey, chocolate …) that are not very well implemented. Soon, a new Mantaflow simulator will be introduced into the blender (by the way, Nils Thuerey is taking part in its development).

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How to make the panel with system disks expanded by default in Blender 2.80 File Browser window

The panel with system disks list is collapsed in the “File Browser” window by default. But some times it is not convenient.

Not to expand it manually every time we can make a simple modification:

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Get Specular reflections from IOR

The official Blender documentation provides a method to get the “Specular” value for the PBR-material reflections if the “IOR” value is known. To get the “Specular” value from the “IOR” value, we can use the following equation:

It is not difficult to create it with nodes:

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Blender add-on: BIS v. 1.8.1.

BIS (Blender Interplanety Storage) updated to v.1.8.1.

 

  • If you get material from the “3D Viewport” window it sets to all selected objects, not only to active.
  • New sub-panel “Tools” added to the BIS panel in the “3D Viewport” window. Added new tools button “Active to Selected” to copy material from active object to all selected objects.
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EEVEE Shadow Catcher

There is a convenient opportunity in the Cycles render engine to render an object with shadows on a transparent background using material with the “shadow catcher” option. There is no such material in EEVEE render engine, however, in EEVEE we can make our own “shadow catcher” based only on nodes.

Completed “EEVEE Shadow Catcher” material you can get from the BIS library.

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Blender add-on: BIS v. 1.8.0.

BIS (Blender Interplanety Storage) updated to v.1.8.0.

  • Added two modes to the BIS panel in 3D_VIEW window: Materials and Meshes. “Meshes” works as previously for saving/loading objects. “Materials” – for simply adding materials to the active object.
  • Fixed critical bug from the previous version which breaks saving/load materials with nested groups.
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Autoclick in Pie Menu

To increase the speed and convenience of working with the “Pie Menu” in Blender you can use its “autoclick” option. To use it press the desired “Pie Menu” call keys, don’t release them, move the mouse cursor in the direction of the desired item, and only then release the buttons on the keyboard. You don’t need to click on a menu item, the choice is made automatically.

15 changes that you need to know when migrating from Blender 2.79 to Blender 2.80

  1. Object selection

2.79: selecting with the right mouse button
2.80: left-click selection

  1. T-panel

2.79: called by pressing the “t” key
2.80: it’s gone, functions moved to the main menu and to the context right-click menu

  1. Deselection

2.79: “a” – select all and deselect all
2.80: “a” – select all, “a – a” or “alt+a” – deselect all

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How to make a pattern from the single element of the BIS library

A single procedural element from the BIS library can be easily transformed into a repeating pattern.

Let’s get a single circular elemetn from the library and place it in the center of the plane.

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