New: V-Ray support

- LightBox now works with V-Ray lights, not only Cycles and EEVEE: colour, temperature, intensity, camera visibility, size / radius, shadows, spread and sun angle go to the V-Ray light
- Changing the light type or shape rebuilds the V-Ray light to match
- V-Ray colour area with a Color / Temperature switch and a Kelvin field
- V-Ray's contribution sliders in the panel; the ray visibility override acts on them instead of splitting lights (full version)
- Light on / off, solo, world off and world solo work in V-Ray, including environment slots and dome lights
- The Shift+Q pie and Add Light at Cursor create V-Ray lights (full version)
- Light linking is carried over into V-Ray's include / exclude lists (full version)
- Viewport value readouts follow V-Ray, including its units (full version)

New: V-Ray light maps

- LightBox presets now look the same in V-Ray as in Cycles: the light's pattern is baked into an image in the background and used as the V-Ray light's texture
- Light maps need Blender 5.1 or newer and work on area lights
- A quick draft map keeps up while you edit, the full resolution map follows once the light stops changing
- Light colour and V-Ray temperature colour are baked in; the light surface stays see-through like in Cycles
- The panel preview matches V-Ray in intensity (all units), colour and temperature
- Maps are saved next to the .blend in a "lightbox_light_maps" folder; unused maps are removed on save

Improvements

- Blender no longer freezes for about a second when the preview renderer starts on Windows
- With several 3D views open, the viewport shortcuts only react in the view under the mouse (full version)

Fixes

- Adding a spot light could crash Blender

Compatibility

- Blender 4.2 and newer, now also tested on Blender 5.3
- V-Ray support tested with V-Ray 7.40 on Blender 5.2 (no V-Ray for Blender 5.3 yet)