BlenderKit: thumbnailer ball, cube, cloth support now microdisplacement,

also previews now scale textures properly.

blenderkit/__init__.py

@@ -173,6 +173,12 @@ thumbnail_snap = (
     ('FLOAT', 'floating', ''),
 )
 
+thumbnail_resolutions = (
+    ('256', '256', ''),
+    ('512', '512 - minimum for public', ''),
+    ('1024', '1024', ''),
+    ('2048', '2048', ''),
+)
 
 def get_upload_asset_type(self):
     typemapper = {
@@ -633,6 +639,13 @@ class BlenderKitMaterialUploadProps(PropertyGroup, BlenderKitCommonUploadProps):
     adaptive_subdivision: BoolProperty(name="Adaptive Subdivide",
                                        description="Use adaptive displacement subdivision", default=False)
 
+    thumbnail_resolution: EnumProperty(
+        name="Resolution",
+        items=thumbnail_resolutions,
+        description="Thumbnail resolution.",
+        default="512",
+    )
+
     thumbnail_generator_type: EnumProperty(
         name="Thumbnail Style",
         items=(

blenderkit/autothumb.py

@@ -217,6 +217,7 @@ def start_material_thumbnailer(self, context):
                 "thumbnail_scale": bkit.thumbnail_scale,
                 "thumbnail_background": bkit.thumbnail_background,
                 "thumbnail_background_lightness": bkit.thumbnail_background_lightness,
+                "thumbnail_resolution": bkit.thumbnail_resolution,
                 "thumbnail_samples": bkit.thumbnail_samples,
                 "thumbnail_denoising": bkit.thumbnail_denoising,
                 "adaptive_subdivision": bkit.adaptive_subdivision,
@@ -270,6 +271,7 @@ class GenerateThumbnailOperator(bpy.types.Operator):
         layout.prop(props, 'thumbnail_angle')
         layout.prop(props, 'thumbnail_snap_to')
         layout.prop(props, 'thumbnail_samples')
+        layout.prop(props, 'thumbnail_resolution')
         layout.prop(props, 'thumbnail_denoising')
 
     def execute(self, context):
@@ -301,6 +303,7 @@ class GenerateMaterialThumbnailOperator(bpy.types.Operator):
         layout.prop(props, 'thumbnail_background')
         if props.thumbnail_background:
             layout.prop(props, 'thumbnail_background_lightness')
+        layout.prop(props, 'thumbnail_resolution')
         layout.prop(props, 'thumbnail_samples')
         layout.prop(props, 'thumbnail_denoising')
         layout.prop(props, 'adaptive_subdivision')

blenderkit/autothumb_material_bg.py

@@ -88,8 +88,8 @@ if __name__ == "__main__":
                 else:
                     ob.cycles.use_adaptive_subdivision = False
                 ts = data['texture_size_meters']
-                # if data["thumbnail_type"] in ['BALL', 'CUBE']:
-                #    utils.automap(ob.name, tex_size = ts / tscale, bg_exception=True)
+                if data["thumbnail_type"] in ['BALL', 'CUBE', 'CLOTH']:
+                   utils.automap(ob.name, tex_size = ts / tscale, just_scale = True, bg_exception=True)
         bpy.context.view_layer.update()
 
         s.cycles.volume_step_size = tscale * .1
@@ -115,6 +115,9 @@ if __name__ == "__main__":
         img.filepath = ipath
         img.reload()
 
+        bpy.context.scene.render.resolution_x = int(data['thumbnail_resolution'])
+        bpy.context.scene.render.resolution_y = int(data['thumbnail_resolution'])
+
         bpy.context.scene.render.filepath = BLENDERKIT_THUMBNAIL_PATH
         bg_blender.progress('rendering thumbnail')
         render_thumbnails()

blenderkit/utils.py

@@ -394,9 +394,22 @@ def get_headers(api_key):
         headers["Authorization"] = "Bearer %s" % api_key
     return headers
 
+def scale_2d(v, s, p):
+    '''scale a 2d vector with a pivot'''
+    return (p[0] + s[0] * (v[0] - p[0]), p[1] + s[1] * (v[1] - p[1]))
+
+def scale_uvs(ob, scale  = 1.0, pivot = Vector((.5,.5))):
+    mesh = ob.data
+    if len(mesh.uv_layers)>0:
+        uv = mesh.uv_layers[mesh.uv_layers.active_index]
+
+        # Scale a UV map iterating over its coordinates to a given scale and with a pivot point
+        for uvindex in range(len(uv.data)):
+            uv.data[uvindex].uv = scale_2d(uv.data[uvindex].uv, scale, pivot)
+
 
 # map uv cubic and switch of auto tex space and set it to 1,1,1
-def automap(target_object=None, target_slot=None, tex_size=1, bg_exception=False):
+def automap(target_object=None, target_slot=None, tex_size=1, bg_exception=False, just_scale = False):
     from blenderkit import bg_blender as bg
     s = bpy.context.scene
     mat_props = s.blenderkit_mat
@@ -435,10 +448,17 @@ def automap(target_object=None, target_slot=None, tex_size=1, bg_exception=False
                 bpy.ops.object.material_slot_select()
 
             scale = (scale.x + scale.y + scale.z) / 3.0
-            bpy.ops.uv.cube_project(
-                cube_size=scale * 2.0 / (tex_size),
-                correct_aspect=False)  # it's 2.0 because blender can't tell size of a cube :)
+            if not just_scale:
+                bpy.ops.uv.cube_project(
+                    cube_size=scale * 2.0 / (tex_size),
+                    correct_aspect=False)  # it's * 2.0 because blender can't tell size of a unit cube :)
+
             bpy.ops.object.editmode_toggle()
             tob.data.uv_layers.active = tob.data.uv_layers['automap']
             tob.data.uv_layers["automap"].active_render = True
+            # this by now works only for thumbnail preview, but should be extended to work on arbitrary objects.
+            # by now, it takes the basic uv map = 1 meter. also, it now doeasn't respect more materials on one object,
+            # it just scales whole UV.
+            if just_scale:
+                scale_uvs(tob, scale=Vector((1/tex_size, 1/tex_size)))
             bpy.context.view_layer.objects.active = actob