在blender中使用 EXR 為畫面分層

 【年度基础计划】Blender合成基础--一起来见证‘’奇迹‘’



插件// Blender_Exr_auto-pass_saver

https://github.com/3d-io/Blender_Exr_auto-pass_saver

注意不需要在Blender中安装，只需要把‘Exr_auto-pass_saver.py’文件

放到你指定的blender版本号插件文件夹中即可 

插件使用

先在blender窗口左上角，打开‘合成器’界面，并启动‘使用节点’

具体使用官网上有一个很详尽的GIF

Blender將粒子系統轉換為動畫網格(py腳本)

import bpy

# Set these to False if you don't want to key that property.
KEYFRAME_LOCATION = True
KEYFRAME_ROTATION = True
KEYFRAME_SCALE = True
KEYFRAME_VISIBILITY = False  # Viewport and render visibility.
KEYFRAME_VISIBILITY_SCALE = True


def create_objects_for_particles(ps, obj):
    # Duplicate the given object for every particle and return the duplicates.
    # Use instances instead of full copies.
    obj_list = []
    mesh = obj.data
    particles_coll = bpy.data.collections.new(name="particles")
    bpy.context.scene.collection.children.link(particles_coll)

    for i, _ in enumerate(ps.particles):
        dupli = bpy.data.objects.new(
                    name="particle.{:03d}".format(i),
                    object_data=mesh)
        particles_coll.objects.link(dupli)
        obj_list.append(dupli)
    return obj_list

def match_and_keyframe_objects(ps, obj_list, start_frame, end_frame):
    # Match and keyframe the objects to the particles for every frame in the
    # given range.
    for frame in range(start_frame, end_frame + 1):
        print("frame {} processed".format(frame))
        bpy.context.scene.frame_set(frame)
        for p, obj in zip(ps.particles, obj_list):
            match_object_to_particle(p, obj)
            keyframe_obj(obj)

def match_object_to_particle(p, obj):
    # Match the location, rotation, scale and visibility of the object to
    # the particle.
    loc = p.location
    rot = p.rotation
    size = p.size
    if p.alive_state == 'ALIVE':
        vis = True
    else:
        vis = False
    obj.location = loc
    # Set rotation mode to quaternion to match particle rotation.
    obj.rotation_mode = 'QUATERNION'
    obj.rotation_quaternion = rot
    if KEYFRAME_VISIBILITY_SCALE:
        if vis:
            obj.scale = (size, size, size)
        if not vis:
            obj.scale = (0.001, 0.001, 0.001)
    obj.hide_viewport = not(vis) # <<<-- this was called "hide" in <= 2.79
    obj.hide_render = not(vis)

def keyframe_obj(obj):
    # Keyframe location, rotation, scale and visibility if specified.
    if KEYFRAME_LOCATION:
        obj.keyframe_insert("location")
    if KEYFRAME_ROTATION:
        obj.keyframe_insert("rotation_quaternion")
    if KEYFRAME_SCALE:
        obj.keyframe_insert("scale")
    if KEYFRAME_VISIBILITY:
        obj.keyframe_insert("hide_viewport") # <<<-- this was called "hide" in <= 2.79
        obj.keyframe_insert("hide_render")


def main():
    #in 2.8 you need to evaluate the Dependency graph in order to get data from animation, modifiers, etc
    depsgraph = bpy.context.evaluated_depsgraph_get()

    # Assume only 2 objects are selected.
    # The active object should be the one with the particle system.
    ps_obj = bpy.context.object
    ps_obj_evaluated = depsgraph.objects[ ps_obj.name ]
    obj = [obj for obj in bpy.context.selected_objects if obj != ps_obj][0]
    
    for psy in ps_obj_evaluated.particle_systems:         
        ps = psy  # Assume only 1 particle system is present.
        start_frame = bpy.context.scene.frame_start
        end_frame = bpy.context.scene.frame_end
        obj_list = create_objects_for_particles(ps, obj)
        match_and_keyframe_objects(ps, obj_list, start_frame, end_frame)

if __name__ == '__main__':
    main()

https://www.youtube.com/watch?v=AhsZ5Ykm63c

記得先烘焙、然後選物體再選發射器再執行腳本

如需旋轉可以用約束 ，初始後

https://blender.stackexchange.com/questions/4956/convert-particle-system-to-animated-meshes?answertab=active#tab-top