Abs only showing in certain lighting?

I don't know if this is normal but I feel like I have fake abs and sometimes people think I photoshop my abs?

I don't have the most defined abs but it kinda shows with proper angle and lighting, but will be gone if I eat a lot or light straight ahead.

Are these proper abs or not? I'm not sure if I actually have abs or fake abs? These are some reference for good lighting and normal lighting:

Normal without posing:

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors