diff --git a/render/rendertest.py b/render/rendertest.py
index 9e670e2..b54dbf4 100755
--- a/render/rendertest.py
+++ b/render/rendertest.py
@@ -107,7 +107,7 @@ def compile():
 	subprocess.run(['make', 'imagecompare'], cwd=ROOT, check=True)
 
 def copy_assets():
-	print('Copying assets')
+	print('Copying assets...')
 	shutil.copy2(src=f'{ROOT}/vulkan_debug.wad', dst=f'{args.xash_dir}/valve/')
 	shutil.copytree(src=f'{ROOT}/maps', dst=f'{args.xash_dir}/valve/maps/', dirs_exist_ok=True)
 	shutil.copytree(src=f'{ROOT}/save', dst=f'{args.xash_dir}/valve/save/', dirs_exist_ok=True)
@@ -115,7 +115,7 @@ def copy_assets():
 		make_script(script, args.tests)
 
 def render():
-	print('Running xash3d')
+	print('Running xash3d...')
 	mkdir_p(f'{args.xash_dir}/valve/rendertest')
 	env = os.environ.copy()
 	env['RADV_PERFTEST'] = 'rt'
@@ -133,11 +133,11 @@ def compare_one(test: str, channel: str, image_base: str, image_gold: str, image
 		case 0:
 			pass
 		case 1:
-			raise Exception(f'FATAL imagecompare error: TBD')
+			raise Exception(f'FATAL imagecompare failed: stdout={result.stdout} stderr={result.stderr}')
 		case 2:
 			print(f'ERROR: {image_base} differ by more than threshold')
 		case _:
-			raise Exception(f'Unexpected imagecompare return code {result.returncode}')
+			raise Exception(f'Unexpected imagecompare return code {result.returncode}: {result}')
 	ret = json.loads(result.stdout)
 	ret['test'] = test
 	ret['channel'] = channel
@@ -152,7 +152,7 @@ def compare():
 	screenshot_base = f'{args.xash_dir}/valve/rendertest'
 	diffs = []
 	command_png()
-	print(f'Compare...')
+	print(f'Comparing...')
 	with concurrent.futures.ThreadPoolExecutor() as executor:
 		for test in args.tests:
 			for channel, _ in channels.items():
@@ -182,6 +182,7 @@ def command_compare():
 	compare()
 
 def command_png():
+	print(f'Converting to png...')
 	screenshot_base = f'{args.xash_dir}/valve/rendertest'
 	new_gold_base = f'{WORKDIR}/gold'
 	mkdir_p(new_gold_base)