Materials do not have image textures applied

[alter-sachin]

System Information Operating system:Linux

Addon version

Worked: (latest version of Stop Motion OBJ that worked as expected)

HI, I have an auto generated sequence of faces generated where each obj has its corresponding MTL and image texture png file. The sequence of objs shows up well in the animations but no textures show up in any view. I hope you could help me in ascretaining what the issue is.

The blender view My sequence of Obj files with mtl and png

[alter-sachin]

https://drive.google.com/file/d/1s3rEvrmj7Sqi2_ya87NAsHzEQ_UgM80p/view?usp=sharing

You can download the sequence from the above link

Best Regards

[alter-sachin]

I hacked together a script to be able to this for me :

`import bpy

scene = bpy.context.scene

i = 0

def returnIfObject(passedName=""): try: result = bpy.data.objects[passedName] except: result = None return result

while(True): scene = bpy.context.scene frame_number = "%05d" % i

print(frame_number)

texture_name = str(frame_number)+".png"
object_name = str(frame_number)
#bpy.ops.image.open(filepath="/home/sachin/Desktop/augmented/voca/TF_FLAME/results/out/"+str(texture_name), directory="/home/sachin/Desktop/augmented/voca/TF_FLAME/results/out/", files=[{"name":texture_name, "name":texture_name}], relative_path=True, show_multiview=False)

mat = bpy.data.materials.new(name=texture_name)
mat.use_nodes = True
bsdf = mat.node_tree.nodes["Principled BSDF"]
texImage = mat.node_tree.nodes.new('ShaderNodeTexImage')
texImage.image = bpy.data.images.load("/home/sachin/Desktop/augmented/voca/TF_FLAME/results/out/"+str(texture_name))
mat.node_tree.links.new(bsdf.inputs['Base Color'], texImage.outputs['Color'])
# Assign it to object
bpy.context.scene.frame_set(i)
#bpy.context.scene.frame_current = i
#myObj = returnIfObject(object_name)
#print(myObj)
#if myObj != None:
#scene = bpy.context.scene
#scene.object.active = myObj
ob = bpy.context.object
if ob.data.materials:
    ob.data.materials[0] = mat
else:
    ob.data.materials.append(mat)
i = i +1
#scene.update()
if(i>99):
    break

`

Thankyou for a great addon :)

[neverhood311]

Thanks for providing the .obj sequence for me to inspect. I tried importing a single mesh from your sequence by doing File > Import > Wavefront (.obj) and Blender still didn't import your material. So I opened up one of your .obj files in a text editor. It looks like you're properly locating the .mtl file with the line: mtllib 00000.mtl, but you're not actually assigning a material to the object, using the line usemtl 00000.

How did you generate these files? If you're creating them with a script, simply add the line usemtl 00000 right after the mtllib 00000.mtl line (obviously you'd replace '00000' with the correct frame number for each frame) and it should import materials automatically without your clever script.

[StephenMcAvoy]

I had a look at the mtl and obj files. They don’t look right for uv mapping. They look right for what is displayed.

Incidentally I have been looking at what the OBJ import module outputs. IYKWIM I have worked out a couple of manual workarounds for transparency maps not being imported correctly. And for bmp maps displaying as if uv mapping was broken. If anyone is interested I’ll write something up.