Blog: Blogs

CAD on linux: Blender

WATCHED - Playlist It is a full series of lessons


organic modelling versus (solid, rigid) precision modelling


  • Any changes need to be saved with File > Defaults > Save Default File
  • It doesn't have ‘single verticles’ by default. Edit > Preferences > Add-Ons > (search for Extra Objects, and) Add Mesh: Extra Objects
  • Change colors of things. Edit > Pref > Themes > 3D View ( > Wire Edit for the lines)
  • Make lines thicker. Edit > Pref > Interface > Line Width: Thick
  • Turn on Snapping. Snapping button from menu > check Absolute Grid Snapping. (Now it will snap only when you are holding down CTRL)
  • PDT tools is an add-on in Preferences
  • There's a Preference also for num pad (so you can hit the numbers on a laptop, don't need a num pad)
  • To see Statistics (how many verts, edges etc). Go to Show Overlays button (overlapping circles) and click the dropdown and check Statistics
  • You can R-click the version number in the bottom-right and do Scene Statistics
  • Measurements. Overlays icon > check Edge Length. Will appear when you select things. It will not display sizes more precise than 0.1 (not 0.15). So don't rely on Edge Length overlay
  • milimeters. Scene Properties > Units, select mm, then set unit scale to 0.001


Supports 3d printing modelling and file formats since 2002.

Blender 3d object drawing (in 2d) with mirror.

  • new project and 2d object. turn on grid in top-right overlays expansion. select draw tool. then on the right side select the wrench and 'add modifier' > 'mirror'
  • you will see the mirror image in one mode and only what you drew in the other, until you 'apply' modifyer.
  • apply it, then select everything by pressing 'a', then click top-left 'object' 'convert to' 'bezier' and you can unvisible the strokes so you just see the bezier lines.
  • on the scene collectionn, you will see beside 'Lines' a little curved illustration. find the same thing below and click it. go to Geometry then Bevel.
  • go to the same spot as before and 'object' 'convert to' 'mesh'. it will look the same. NOTE it has to already be bezier curved and that has to be selected in the collection.
  • beside 'edit mode' in the top-left there's three squares. pick the middle one 'edge'
  • select what edges you want to make faces for and click 'f'



Parrot OS

(Had to give up on Parrot. Things stopped working constantly. Terminal stopped opening on ctrl-alt-t. Double quotaiton marks started printing @ instead (on desktop environment (Mate), not in a VM where it printed the double quotes). Printers stopped being detected. Batter warnings started popping up constantly when charging, until I disabled them in DConf. Menus were buggy. Computer froze sometimes. Dec 2021.)

  • LMMS
  • GNU
  • Leafpad
  • Kden
  • Gnome disks
  • Gparted
  • Screenshot
  • Thunar
  • Vokoscreen
  • Oracle VM
  • Firefox
  • LibreOffice
  • Task Manager


Menu 'Startup applications' turn off bluetooth

Menu 'Control Center' > Mouse preferences > Touchpad > uncheck 'Enable natural scrolling'

remove snapd vlc audacity add gnome-disks gedit thunar secure-delete youtube-dl

sudo apt autoremove --purge snapd ; sudo apt-get autoremove vlc-nox ; sudo apt-get purge vlc ; sudo apt-get autoremove ; sudo apt-get purge vlc-data ; sudo apt-get autoremove --purge vlc ; sudo apt-get remove browser-plugin-vlc ; sudo apt-get autoremove ; sudo apt-get purge audacity ; sudo apt-get autoremove ; sudo apt-get autoclean ; shred -rf ~/.audacity-data/ ; rm -rf ~/.audacity-data/ ; just sudo apt-get install gedit ; sudo apt-get install thunar ; sudo apt-get install secure-delete ; sudo apt-get install youtube-dl

sudo sfill -f /home

To install printer driver (deb package, missing dependencies and had to sudo apt-get install -f (twice actually). Then I could install the lsb-compat and then the epson-printer-utility. I had to install 2. So next time try just the second deb option first.

installed shotwell

installed virtualbox

sudo apt-get update, and redit above mass command (this time it did some more)


Notes on Alesis SamplePad - Load your own samples

USE 32gb or less SD card (larger won't be recognized).

ALL SAMPLES must be 16bit wav files. Must be 16bit, 48000, mono. Program from Alesis to do this: (No linux).

Don't make folders (you won't be able to find them). Make samples like 8 characters so you can read them on the display.

Hold down-arrow and right-arrow for 2secs.



Comment by Sean Combs:

Great tutorial. I have a few additions.

  1. COPY KIT is ALMOST the only way to create a NEW KIT. All new kits are created on the SD Card. No SD Card, NO NEW KIT. Once it's copied, change the pad sounds to what you want on the new kit, and SAVE.
  2. An option to #1 above, You can put your SD Card in your computer and copy / paste .KIT files (inside the KIT older) but you need to rename the copy. File name is limited to 8 characters. (See #4 below). The only way to get new sounds assigned to this new kit is through the Alesis Sample Pad Menu. This allows you to quickly create as many new kits as you want but you will still have to edit the sounds assigned to the kit on the Sample Pad.
  3. You can change the name of your created Kits. With your SD Card in your computer, open the folder named "KITS". You will see files such as USER_001.KIT. You can change the USER_001 portion to whatever you want, with no special characters (except _), no spaces, and it CANNOT be more than or less than 8 characters before ".KIT". For example, I use a certain kit for our cover song by Stone Sour. I renamed USER_001.KIT to STONSOUR.KIT. The kit will still be named "KIT 11" in the left corner of the Alesis screen, but the center top of the screen shows "STONSOUR" (The File Name) . As I mentioned in #3 above, it takes about 20 seconds for all 8 of my custom sound files to load to this kit.

Notes on digital pianos (LMMS)

Add soundfont to LMMS to have a piano

  1. Go to and download 'GeneralUser GS 1.471'. This is also the name of the sf2.
  2. Extract the contents of the zip into your LMMS Samples folder. (You can find/set this in Edit > Settings Now restart LMMS and go to Samples and find that thing.



Making collages

Use photowall app. Download the binary file (not the tar.gz) and them r-click Permissions, and make it executable. Then double-click it to run. (

An 8.5x11 page (a4 page, ie 'letter' page) at 300dpi is 2550pixels wide x 3300. (European is just slightly different at 210 x 297 mm.)

In PhotoWall, you can 'Print' the page to a pdf, then view the pdf (change to 100%) to see how it will come out.

To print, you might need to download the driver for the printer. When you plug it in the USB and attempt to print, it will 'Getting Printer Information' and this will tell you the printer name.

Also shotwell (install shotwell). You can select how many images per page and print to pdf.