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videovillage / Lattice-Issues

Feature requests, bug tracking, questions, and issues for Lattice.
https://videovillage.co/lattice
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Viewer artifacts with 3D identity lut (odd numbers below 65x only) #78

Closed andyp6 closed 5 years ago

andyp6 commented 6 years ago

Hi Greg,

I've not noticed this before but the Lattice viewer shows significant artifacts when creating any new identity lut with an odd number of grids (anything below 65^3 seems to be a problem).

An identity created with an even number of grids does not show any artifacts.

I tested the actual luts in After Effects, Resolve, Nuke etc and they seem fine but I need to be able to trust the viewer.

To reproduce load this test image https://truecolor.us/downloads/lut-stress-test-image/ and create a new 3D lut (17, 33 etc).

Will send an example if needed.

My current OS is 10.12 Sierra (via VMware - might that be the problem?). No problems with monitor calibration, ICC profiles etc.

gregcotten commented 6 years ago

Hello! This is a weird one. I don't have an issue here. It's possible VMWare could be the culprit? Could you send test images?

What I'm seeing: 32x

screen shot 2018-08-30 at 11 50 25 am

33x

screen shot 2018-08-30 at 11 50 28 am
andyp6 commented 6 years ago

I'm suspecting VMWare is the culprit here (no direct support for graphics cards) but I don't currently have access to a Mac at my location to test.

Here's one at 33x

identity_33x_artifacts

and 63x (though I would never use this size)

identity_63x_artifacts

and 32x without any problems

identity_32x_no_artifacts

wilg commented 5 years ago

Unfortunately, we can't support emulated environments and haven't seen this elsewhere, so closing the issue.