At the moment (things are going very fast here), you have to manually add the twig to the particle system of the tree, into the Dupli Object slot, and rise the size of particles a bit.
paolo
Hi Maxime,
A great thanks for your so big job!
Could you corrected one thing please? The name of python file donât use of capital and âaddon_â is not necessary.
there are naming conventions to respect in the blender scripts look in the list of addons and addons_contrib.
So:
addon_add_Modular_tree.py must be simply: add_modular_tree.py Yeh!
and your addon create an tree object and not a mesh, I mean.
So you can correct the category too: âObjectâ
(But if itâs too a mesh: the name become : add_mesh_modular_tree.py and category donât change: âAdd Meshâ)
When making a tree, enable âconfigure particle systemâ, then make a twig, then go to the particle settings of your tree and select your leaf as the dupli object.
All this will be easier in the next version of the addon.
Oh I see, thank you for the help. And a big big thank you for the addon!
Future Releases
- Fade in vertex group to mask uvs/generated coords. - 0%
- Disable uv generation for twigs - 0%
- Update material generation for new uv/generated coords. mask - 0%
- Built-in Presets - 0%
- Twig in particle system support - 0%
- Surprise Me button (random settings) as per user request - 0%
- Different leaf shapes for twig - 0%
Awesome looking roadmap! 
Tried it out, very nice!
- Make sure your tree has the âconfigure particle systemâ option enabled (in advanced settings)
- Go to the particle system tab for the tree and select the twig in the object drop-down (in the ârenderâ panel)
- Adjust the twig size with the size control and the size variation with the random size (random size is a percentage of variation from 0-1)
Thanks Graphics_Dev, thats super helpful. Its a great addon.
Most important feature for creating realistic trees is option to control a leaf (twig?) direction. No only ONE leaf - all leafs should be controlled with some rules (vector directions). Leafs direction is changing with growing tree - but leafs are always âlookingâ for sunshine. Leafs want use ALL of their area to photosynthesis - thatâs a reason why leafs are not growing in âANYâ directions from branches. Here is example - EVERY leaf want to see sun with all his area. This is a reason why tree look real (for human eye and brain):
Every tree has own leafs order.
I made hundreds of trees and i see that in many cases trunk can be very simple and branches too, but leafs order is most important to keep tree model look real.
Greetings and thank You guys for such hard work for community. This addon is growing very fast:) like a tree:)
The github installation guidelines are currently invalid!
We are working on moving to a zip add-onâŚplease be patient with us as this may take a couple hours.
AlrightâŚeverything is fixed! Iâve updated the wiki as well. Two presets have been included in this release sort of as a proof of concept, but more will follow in the future. The biggest thing in this release is the wind animation system with the displace modifier.
I agree, but unfortunately I cannot control particle orientation with python, the only way would be to have real leaves, not particles, but thatâs a tremendous number of leaves, I donât think blender can handle it.
This might be helpful: https://blenderartists.org/forum/showthread.php?402428-Matching-particle-rotation-to-emitter-face-rotation-possible
These:
bpy.data.particles["ParticleSettings.001"].use_rotations = True
bpy.data.particles["ParticleSettings.001"].rotation_mode = 'NOR_TAN'
bpy.data.particles["ParticleSettings.001"].use_rotation_dupli = False # Locks particle rotation when rotating emiting object
were gleaned while testing the above.
The problem is that, in this specific instance, particles are the twigs, not the leaves, and I really like such approach BTW, so also the twigs would have to be generated with all upward oriented leaves, and the final result could loose too much of randomness, and make too evident repetitions.
Just my thought.
paolo
by the way ⌠you could use a particle instance modifier to create the leaves as particles at the twigs.
You end up with particles of particles ⌠thereâs a nice short tutorial on that, which can be found here:
http://www.local-guru.net/blog/2015/6/3/particle-emitting-particlesâtutorial
If you model your own leaf object to be distributed at the twig, you have pretty much control over the leaf and twig distributions.
I made a short test and it works quite well.
Great addon! Keep up the good work!
I would love to have a possibility to tweak different branch levels!
True. This just glues emitter and particle together predictably. Youâd have to manipulate the emitter face orientation. In relation to Local / Global Z / gravity vector? Some leaf fanning scheme to maximise (sun) ray exposure?
Release 2.4 is out! I added a check for updates button in the addon prefs, documentation links for all settings, and fixed several major bugs. I am working on the docs right nowâŚplease be patient, but do check it out and see if you can learn anything!
Happy blending!
I see some huge pause in developing this awesome script 
17 days without any news about what next I hope everything is OK, guys? Health, families and other kind of stuff, i hope everything is ok! 
Greetings
@hris I know itâs been a long delay I am in the school year now, so I donât have a lot of spare time. I really donât know about @Maxime. The good news is that I am studying computer science, so when I get back, hopefully I can do more!
Relax, do school and life and get back to it when you have time