Add --allow-downloads argument and update model path help text

generate_equirect.py

@@ -795,7 +795,7 @@ def main():
     parser.add_argument(
         '--model-path',
         default=MODEL_PATH,
-        help='Diffusers model id or local path (default: ProGamerGov/sdxl-360-diffusion)'
+        help='Diffusers model id or local path (default: local models/sdxl360Diffusion_v10.safetensors when present)'
     )
     parser.add_argument(
         '--base-model',
@@ -821,11 +821,19 @@ def main():
         choices=['euler', 'euler_a', 'heun', 'ddim', 'dpmsolver', 'dpmsolver-sde'],
         help='Sampler/scheduler override; default uses the pipeline scheduler (Euler for SDXL base)'
     )
+    parser.add_argument(
+        '--allow-downloads',
+        action='store_true',
+        help='Allow missing model files to be downloaded from remote model hubs'
+    )
     parser.add_argument('--postprocess-input', help=argparse.SUPPRESS)
     parser.add_argument('--postprocess-output', help=argparse.SUPPRESS)
     parser.add_argument('--postprocess-tempdir', help=argparse.SUPPRESS)
     args = parser.parse_args()
 
+    if args.allow_downloads:
+        os.environ["SKYMAP_ALLOW_DOWNLOADS"] = "1"
+
     if args.postprocess_input:
         if not args.postprocess_output or not args.postprocess_tempdir:
             parser.error("--postprocess-input requires --postprocess-output and --postprocess-tempdir")