Bitmap converter to VRayHDRI

[vlado]

After converting to tiled EXR, should this be viewable in Photoshop? I can't see the pyramid tiles.

Photoshop probably doesn't read the mip-map levels, just the most detailed original one.

Best regards,
Vlado

[DPS]

Photoshop probably doesn't read the mip-map levels, just the most detailed original one.

Best regards,
Vlado

Any ideas whether there is a way to edit or use a manually created mipmap?

[vlado]

Any ideas whether there is a way to edit or use a manually created mipmap?

I have seen custom created maps with different images for the different mip-map levels (we have even used such files for testing V-Ray's ray differentials), but the only way that I know of to create them is programmatically in C++ by directly interfacing with f.e. the OpenEXR or TIFF libraries.

Best regards,
Vlado

[DPS]

Is there any chance you guys could let users have one?

I wanted to run some tests using a numbered or colour coded mipmap so I can see whih levels are being selected.

I found in general that the tiles exrs render faster. I assumed this would also be a good method to use for leaves on trees however I found in both vray and mr this I be slightly slower than a regular map.

[DPS]

I have a couple of questions regarding mipmapping:

- Can anyone shed any light as to scenarios where mipmapping will always result in a faster render?

- I am having mixed results on some test scenes and I can't see a pattern - sometimes it will be faster, sometimes not. It's always slower when mipmapping leaves of a tree.

- Would converting-to-tiled-exr only be no-brainer on scenes that are maxing out Vrays dynamic memory limit?

I assumed that by removing the bitmap filtering process from rendering, it should always be faster. I've tried Vrays exr to tiled HDR converter and maketx.exe.