RenderEngine(bpy_struct)

Simple Render Engine

import bpy


class CustomRenderEngine(bpy.types.RenderEngine):
    # These three members are used by blender to set up the
    # RenderEngine; define its internal name, visible name and capabilities.
    bl_idname = 'custom_renderer'
    bl_label = 'Flat Color Renderer'
    bl_use_preview = True

    # This is the only method called by blender, in this example
    # we use it to detect preview rendering and call the implementation
    # in another method.
    def render(self, scene):
        scale = scene.render.resolution_percentage / 100.0
        self.size_x = int(scene.render.resolution_x * scale)
        self.size_y = int(scene.render.resolution_y * scale)

        if scene.name == 'preview':
            self.render_preview(scene)
        else:
            self.render_scene(scene)

    # In this example, we fill the preview renders with a flat green color.
    def render_preview(self, scene):
        pixel_count = self.size_x * self.size_y

        # The framebuffer is defined as a list of pixels, each pixel
        # itself being a list of R,G,B,A values
        green_rect = [[0.0, 1.0, 0.0, 1.0]] * pixel_count

        # Here we write the pixel values to the RenderResult
        result = self.begin_result(0, 0, self.size_x, self.size_y)
        layer = result.layers[0]
        layer.rect = green_rect
        self.end_result(result)

    # In this example, we fill the full renders with a flat blue color.
    def render_scene(self, scene):
        pixel_count = self.size_x * self.size_y

        # The framebuffer is defined as a list of pixels, each pixel
        # itself being a list of R,G,B,A values
        blue_rect = [[0.0, 0.0, 1.0, 1.0]] * pixel_count

        # Here we write the pixel values to the RenderResult
        result = self.begin_result(0, 0, self.size_x, self.size_y)
        layer = result.layers[0]
        layer.rect = blue_rect
        self.end_result(result)

# Register the RenderEngine
bpy.utils.register_class(CustomRenderEngine)

# RenderEngines also need to tell UI Panels that they are compatible
# Otherwise most of the UI will be empty when the engine is selected.
# In this example, we need to see the main render image button and
# the material preview panel.
from bl_ui import properties_render
properties_render.RENDER_PT_render.COMPAT_ENGINES.add('custom_renderer')
del properties_render

from bl_ui import properties_material
properties_material.MATERIAL_PT_preview.COMPAT_ENGINES.add('custom_renderer')
del properties_material

base class — bpy_struct

subclasses — CYCLES

class bpy.types.RenderEngine(bpy_struct)

Render engine

bl_idname

Type :string, default “”, (never None)

bl_label

Type :string, default “”, (never None)

bl_use_postprocess

Type :boolean, default False

bl_use_preview

Type :boolean, default False

bl_use_shading_nodes

Type :boolean, default False

camera_override

Type :Object, (readonly)

is_animation

Type :boolean, default False

is_preview

Type :boolean, default False

render

Type :RenderSettings, (readonly)

resolution_x

Type :int in [-inf, inf], default 0, (readonly)

resolution_y

Type :int in [-inf, inf], default 0, (readonly)

tile_x

Type :int in [0, inf], default 0

tile_y

Type :int in [0, inf], default 0

use_highlight_tiles

Type :boolean, default False

update(data=None, scene=None)

Export scene data for render

render(scene=None)

Render scene into an image

view_update(context=None)

Update on data changes for viewport render

view_draw(context=None)

Draw viewport render

update_script_node(node=None)

Request update call for viewport rendering

tag_redraw()

tag_redraw

tag_update()

tag_update

begin_result(x, y, w, h, layer="")

begin_result

Parameters:

• x (int in [0, inf]) – X
• y (int in [0, inf]) – Y
• w (int in [0, inf]) – Width
• h (int in [0, inf]) – Height
• layer (string, (optional, never None)) – Layer, Single layer to get render result for

Returns:

Result

Return type:

RenderResult

update_result(result)

update_result

Parameters:result (RenderResult) – Result

end_result(result, cancel=False)

end_result

Parameters:

• result (RenderResult) – Result
• cancel (boolean, (optional)) – Cancel, Don’t merge back results

test_break()

test_break

Returns:Break Return type:boolean

update_stats(stats, info)

update_stats

Parameters:

• stats (string, (never None)) – Stats
• info (string, (never None)) – Info

update_progress(progress)

update_progress

Parameters:progress (float in [0, 1]) – Percentage of render that’s done

update_memory_stats(memory_used=0.0, memory_peak=0.0)

update_memory_stats

Parameters:

• memory_used (float in [0, inf], (optional)) – Current memory usage in megabytes
• memory_peak (float in [0, inf], (optional)) – Peak memory usage in megabytes

report(type, message)

report

Parameters:

• type (enum set in {‘DEBUG’, ‘INFO’, ‘OPERATOR’, ‘PROPERTY’, ‘WARNING’, ‘ERROR’, ‘ERROR_INVALID_INPUT’, ‘ERROR_INVALID_CONTEXT’, ‘ERROR_OUT_OF_MEMORY’}) – Type
• message (string, (never None)) – Report Message

Inherited Properties

bpy_struct.id_data

Inherited Functions

bpy_struct.as_pointer bpy_struct.driver_add bpy_struct.driver_remove bpy_struct.get bpy_struct.is_property_hidden bpy_struct.is_property_set bpy_struct.items bpy_struct.keyframe_delete

bpy_struct.keyframe_insert bpy_struct.keys bpy_struct.path_from_id bpy_struct.path_resolve bpy_struct.property_unset bpy_struct.type_recast bpy_struct.values