for me to not forget. for you free to use.

b3d
a(sellect all) - alt+n - recalculate outside - fix normals (shift+n - also fixing normals somehow) (a - mesh - clean up - by distance)
alt+z - x-ray (transparency view)
ctrl+r - loop cut (rmc to leave it at center)
1,2,3 - select modes
e+s - extrude inside - shift+z,x,y - exclude axis while extruding
numpad/ - local view (solo object for precise editing)
ctrl+b - bewel/borders (spin mw to add more edges)
shift+r - repeat last
*(create symetrical "mirror" like patters, shift+d -> r+ctrl (rotate 60d) -> shift+r (duplicate and rotate new objects))
ctrl+j - join
ctrl+a - apply (scale or other parameters)
rmc - set origin - origin to 3d cursor
collection - (join similar objects, can separate them later: object - relations - make single user - oblect & data)
s -> y -> 0 -> enter - all faces =0 on y-axes (make faces flat)
shear - change agle of faces direction to extrude in disired direction
object data prop (3 dots conected side panel) - normals - autosmooth
spin tool - create perfect round shapes without extrude. (don't forget to select only the face you want to extrude/spin, in other case it will play as reapeter tool in ae)
v - create a cut on edge and separate object on 2 in this place
m - merge (merge vert at center to close hole)
ctrl+i- invert selcetion
p - separate selection (to new object etc)
l - select separette object in complex figure
object - convert to curve - add depth = circle + solidify
ctrl+e - mark seam
ctrl+l - link (by material etc.)
alt+g - reset
uv unwrap
https://youtu.be/g9FTp8vTwfw
select - overlap - figure out
caustics - luxcore - combine in post
s - x,y,z, - -1 - enter - flip image
j - join 2 vertecies
ctrl+h - hook
Select main object (what you want to cut), after that enter the “Edit Mode” and select
extracted object with SHIFT key in the OUTLINER window and after that
click “Mesh > Knife Project”. https://youtu.be/M9EMWYOgmqk
g,s + yy,xx,zz - move or scale on local axis of object (double press xx, yy,zz)
array modifier acts as reapeter
alt+e - extrude options, extrude on normals
shift+ctrl+r - add 2 additional edges on sides
smart join 2 faces alt+lmc (select 1st face hole) + shift + alt + lmc (2nd face hole) + f3 (bridge) + shift+e (making connection more detailed)
rmc - loop tool - *addon - change for of selected faces to make clean mesh holes
edge - bridge edge loops - connect two holes
if you want to make ctrl+r but not around all form, you can hide one face (bwm tut 010 11 7:43) and then press ctrl + r (+e - even, +f - flip)
ctrl+p - parent (example of use: parent (keep transform) objects to empty to create basic rig)
A render border is defined by Ctrl-B and can be removed with Ctrl-Alt-B

nodes
shift+ctrl+hold and move rmb - to create mix node

uv
DISTORTION fix - chose 1 square face - aligh sides to x - top botton to y - chose all faces - fixed face chose with shift last one (to make it active) - go UV on top panel -> follow active quads - hit enter - vuala
!
сtlr+l - link select (select desired separate part of uv (like l to select separetad object))