Blowup render vs Region render

[zhopudey]

I did a blowup render, and the texture bitmaps have come out very blurry -

 

 

Then I did a region render for comparision, and it rendered just fine -

 

 

 

Why is this?

[JonRashid]

Because your blow up is at a different resolution than the render region. The clue is in the terminology. Render region keeps the render settings you have set. Render blow-up is exactly that - a blow up of that area

[zhopudey]

I thought blowup meant the camera zooms into the selected region and renders it at the full settings. Here I'd kept resolution 1000 for the blowup, and 10,000 for the region so that I'll get equivalent results.

[Chad Warner]

I haven't tried it in awhile, but if you're using vray, it used to (it may still) have issues with blowup.

[zhopudey]

Yeah, I'm using vray.

[Chad Warner]

Just ran a test to see what I got,and there was definitely an issue with bitmaps when using blowup and Vray. All my procedural materials were fine, but anything with a bitmap got very blurry. My workaround to this problem is to just use crop with a higher output resolution.

[zhopudey]

Thanks. Glad to know it wasn't something I was doing wrong.