prixat, that's interesting. What a good eye you have. (As I said earlier, I'm no artist.)

I didn't change any of the parameters in the pz3 (I just changed the render setting to Ultra GPU for my test). So I poked around and found this:

The EZInner object that came with the pz3 didn't have Visible in Rayt checked! That could make a difference. So I checked Visible in Rayt and Light Emitter and did a fast Low GPU render. No luck.

I changed the EZInner and EZOuter mats to just a PBR root node with the hdr image and rendered again. No hdr reflection.

I changed the Bathroom_1 object Light_184 mat emission from 10 to 1. Rendered again. No difference, so I set it back to 10. I changed the hdr image. Rendered again.

I saw a slight shadow of treetops, so next I made the shower glass and window glass transparent. Rendered again.

So the shower glass is missing but the reflection is still Nothingville. I give up!

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W11,Intel i9-14900KF @ 3.20GHz, 64.0 GB RAM, 64-bit, GeForce GTX 4070 Ti SUPER, 16GB. 

Old lady hobbyist.

All visual art or fiction is "playing with dolls."