different render results from blender GUI and bpy script (load gltf model)

[wangsen1312]

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I have load the gltf model and try to render it, but bpy script seems not working!

Render Code:

import bpy
import bmesh
import mathutils
from math import radians
import numpy as np

cam_data = bpy.data.cameras.new('camera')
cam_data.sensor_height = 32
cam_data.sensor_width = 32
cam_data.lens = 35
cam = bpy.data.objects.new('camera', cam_data)
bpy.context.collection.objects.link(cam)
bpy.context.scene.camera = cam
cam.location       = (1, 0, 0)
cam.rotation_mode  = 'ZXY'
cam.rotation_euler = (0, radians(90), radians(90))
# This is camera parent for rotation
org_obj                = bpy.data.objects.new("RotCenter", None)
org_obj.location       = (0, 0, 0)
org_obj.rotation_euler = (0, 0, 0)
bpy.context.collection.objects.link(org_obj)
cam.parent = org_obj
# apply euler to camera
azimuth = 7.81525986082
altitude = 29.2191726248
yaw = 0.0
org_obj.rotation_euler = (radians(-yaw),
                          radians(-altitude),
                          radians(-azimuth))
cam.location       = (1.75* 0.72636316495, 0, 0)

light_data_1 = bpy.data.lights.new('light', type='POINT')
light_1 = bpy.data.objects.new('light', light_data_1)
bpy.context.collection.objects.link(light_1)
light_1.location = mathutils.Vector((3.75, 0, 0)) #* data_param[cur_id][3]

#light_data_2 = bpy.data.lights.new('light', type='AREA')
#light_2 = bpy.data.objects.new('light', light_data_2)
#bpy.context.collection.objects.link(light_2)
#light_2.location       = (0, 2, 2)
#light_2.rotation_mode  = 'ZXY'
#light_2.rotation_euler = (-radians(45), 0, radians(90))
#light_2.data.energy = 0.7

light_data_3 = bpy.data.lights.new('light', type='SUN')
light_3 = bpy.data.objects.new('light', light_data_3)
bpy.context.collection.objects.link(light_3)
light_3.location = mathutils.Vector((5, 5, 5))

bpy.ops.object.select_pattern(pattern="Cube")
bpy.ops.object.delete()

file_paths = r'model.gltf'
bpy.ops.import_scene.gltf(filepath=file_paths)


cur_id = 0
render_location = r"Test2_%02d.png"%(cur_id)
print(f"Rendering to {render_location}")

#bpy.context.scene.world.light_settings.use_ambient_occlusion = True
#bpy.context.scene.world.light_settings.ao_factor = 0.5
bpy.context.scene.render.image_settings.file_format = 'PNG'
bpy.context.scene.render.resolution_x = 256
bpy.context.scene.render.resolution_y = 256
bpy.context.scene.render.resolution_percentage = 100
bpy.context.scene.render.engine = 'CYCLES'
# filepath
bpy.context.scene.render.filepath = render_location

bpy.ops.render.render(write_still=True)
print(f"Completed: Rendering to {render_location}")

The model is attached: model.zip

bpy render results:

blender GUI:

I have tried on Windows and Ubuntu, the bpy results are the same.

[TylerGubala]

I just loaded your exact script into the Blender "Scripting" GUI (without doing anything else) and got the following:

Can you further explain what you expect to see here?

[wangsen1312]

@TylerGubala Thank you for you response I think the correct render results should like below：

If you can use blender import the model and alt +z render it, you can see the results looks like above.

[TylerGubala]

But that's not what you said, you said that when running the script in Blender GUI you were seeing the correct result.

But it looks like you are not running the script, but rather that you are pressing the render button.

I think you need to ask on Stack Exchange about how to render the result you want using Python, because bpy seems to create the same result as Blender, all things (your script) considered equal.

On Thu, Mar 4, 2021, 10:48 PM wangsen1312 [email protected] wrote:

@TylerGubala https://github.com/TylerGubala Thank you for you response I think the correct render results should like below：

[image: model] https://user-images.githubusercontent.com/11545246/110064676-d1fc3f80-7d2a-11eb-840a-d6fdec7d413b.png

If you can use blender import the model and alt +z render it, you can see the results looks like above.

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