Test

Add transfunc and grayscale to render_images #1335

Job	Run time
get-environments	7s
hatch-test.py3.14-pre (PRE-RELEASE DEPENDENCIES)	3m 20s
hatch-test.py3.14-stable	5m 11s
hatch-test.py3.11-stable	3m 57s
Tests pass in all hatch environments	4s
	12m 39s

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