Uploaded December 2019 | Updated September 2026, 1 week ago
A detailed look at using the UVW Randomizer in Corona Renderer for 3ds Max.
00:00 - Title screen
00:02 - Introduction
00:16 - What UVW space means in 3ds Max, the bitmap settings
00:36 - What UVW space means in 3ds Max, the geometry UVW mapping
01:13 - Illustrating how UVW works in 3ds Max with a test case
02:27 - Note, offsets in whole numbers looks like no change at all
02:37 - Summary of best practices for UV mapping
02:49 - The test scene for the UVW Randomizer
03:23 - Getting to know the UVW Randomizer
04:01 - The effects of changing the Offset
04:10 - The effects of changing the Step for the Offset
04:34 - The effects of changing the Rotation (degrees)
04:46 - The effects of changing the Scale values
05:03 - The effects of the Same as U checkbox
05:16 - How to flip the bitmap
05:43 - First real world example, fingerprints on a bowl - single seamless bitmap, no direction to bitmap
06:32 - Reminder that offsets in whole numbers look like no change at all (so large numbers here are not "more random")
07:24 - Second real world example, wood on kitchen doors - multiple seamless bitmaps for multiple channels, with direction (grain), wood on kitchen doors
07:42 - Using Linear Floats to adjust multiple UVW Randomizers at once (for the diffuse, glossiness, etc. channels)
08:25 - Storing the UVW Randomizer in a 3ds Max material library with linked Linear Floats for easy re-use in the future
08:34 - Setting up the randomization for the cabinet doors
08:55 - Using the Seed to get different results
09:11 - Setting the Rotation to respect the grain direction (using Step)
10:04 - Working with non-seamless textures (3 wood planks in one bitmap)
10:16 - The set up for our test scene, to clearly illustrate results in the tutorial
10:50 - Setting up the Scale to show just one of the three planks
11:17 - Setting up the V Offset to adjust by one whole plank at a time
11:51 - Setting up the U Offset to avoid overlapping edges (seams)
12:37 - Final set up of the planks
13:08 - Third real world example, scaling leaves on a tree
14:20 - Thanks for watching!
Multimap Tutorials:
youtube.com/watch?v=MiRRR6vgsEM (newest)
youtube.com/watch?v=fmlIb-fVfmw (older)
The Corona Helpdesk UVW Randomizer page:
coronarenderer.freshdesk.com/support/solutions/articles/12000039642-what-is-the-coronauvwrandomizer-map-
A detailed look at using the UVW Randomizer in Corona Renderer for 3ds Max.
00:00 - Title screen
00:02 - Introduction
00:16 - What UVW space means in 3ds Max, the bitmap settings
00:36 - What UVW space means in 3ds Max, the geometry UVW mapping
01:13 - Illustrating how UVW works in 3ds Max with a test case
02:27 - Note, offsets in whole numbers looks like no change at all
02:37 - Summary of best practices for UV mapping
02:49 - The test scene for the UVW Randomizer
03:23 - Getting to know the UVW Randomizer
04:01 - The effects of changing the Offset
04:10 - The effects of changing the Step for the Offset
04:34 - The effects of changing the Rotation (degrees)
04:46 - The effects of changing the Scale values
05:03 - The effects of the Same as U checkbox
05:16 - How to flip the bitmap
05:43 - First real world example, fingerprints on a bowl - single seamless bitmap, no direction to bitmap
06:32 - Reminder that offsets in whole numbers look like no change at all (so large numbers here are not "more random")
07:24 - Second real world example, wood on kitchen doors - multiple seamless bitmaps for multiple channels, with direction (grain), wood on kitchen doors
07:42 - Using Linear Floats to adjust multiple UVW Randomizers at once (for the diffuse, glossiness, etc. channels)
08:25 - Storing the UVW Randomizer in a 3ds Max material library with linked Linear Floats for easy re-use in the future
08:34 - Setting up the randomization for the cabinet doors
08:55 - Using the Seed to get different results
09:11 - Setting the Rotation to respect the grain direction (using Step)
10:04 - Working with non-seamless textures (3 wood planks in one bitmap)
10:16 - The set up for our test scene, to clearly illustrate results in the tutorial
10:50 - Setting up the Scale to show just one of the three planks
11:17 - Setting up the V Offset to adjust by one whole plank at a time
11:51 - Setting up the U Offset to avoid overlapping edges (seams)
12:37 - Final set up of the planks
13:08 - Third real world example, scaling leaves on a tree
14:20 - Thanks for watching!
Multimap Tutorials:
youtube.com/watch?v=MiRRR6vgsEM (newest)
youtube.com/watch?v=fmlIb-fVfmw (older)
The Corona Helpdesk UVW Randomizer page:
coronarenderer.freshdesk.com/support/solutions/articles/12000039642-what-is-the-coronauvwrandomizer-map-
