topic Re: imageplane with alpha and dof in Maya Forum

imageplane with alpha and dof

thomas_kutschera — Thu, 16 Aug 2018 12:24:00 GMT

I am wondering if anyone else is running into this poblem:

Maya 2018, I setup a simple scene:

- several primitives

- turn on Depth of Field in my perspective

- low fstop like 2.5

- adjust the focus distance

--> result in the viewport is as expected, objects get blurred according to their distance towards camera

- same scene, add an imageplane to my camera, image has an alphachannel, black and white areas

--> result: objects behind the imageplane are blurred no matter what value I use for my focus distance

changing the VP2 options --> performance --> transparency Algo doesn´t help.

Any suggestions?

Re: imageplane with alpha and dof

mspeer — Thu, 16 Aug 2018 12:48:07 GMT

Hi!

Here it works.

Please add more details, like used Viewport modes / Render engine setting and your GPU.

Also please add a scene-file + texture.

Re: imageplane with alpha and dof

thomas_kutschera — Thu, 16 Aug 2018 13:14:41 GMT

setup a fresh scene for better understanding.

- used viewport2, all transparency algos

- tested DirectX 11, openGL - legacy, openGL - legacy (compatibility), openGL - core profile (strict),

- no occlusion, no antialias

imageplane in front of camera remains sharp, no blur to nothing

turning imageplane off in viewport, evereything´s fine

Re: imageplane with alpha and dof

thomas_kutschera — Thu, 16 Aug 2018 13:17:43 GMT

and that´s how it looks like...

Re: imageplane with alpha and dof

mspeer — Thu, 16 Aug 2018 14:54:11 GMT

Hi!

You are right.

In my first test my image plane had a too high value for depth and was behind the objects.

This Depth of Field effect is not a "real" 3D effect.

If you use any transparent object, a polygon object or an image plane the Depth value of the object in front will be chosen for blur calculation. Could this be handled different, sure, but a more exact display would have a significant impact on render time and FPS for Viewport/Hardware Rendering.

Re: imageplane with alpha and dof

thomas_kutschera — Thu, 16 Aug 2018 15:15:03 GMT

the funny or annoying thing is: in maya2016 it´s working!

Re: imageplane with alpha and dof

mspeer — Thu, 16 Aug 2018 15:29:40 GMT

Hi!

Thanks for the info. It works correct in Maya 2016.5 and Maya 2017.

So for some reason they changed the extra handling of the image plane in Maya 2018.

As it worked in previous releases as expected, i would consider this as a bug.

Please report this problem (bug?) to Autodesk.
Help -> Speak Back -> Report a Problem

Re: imageplane with alpha and dof

thomas_kutschera — Mon, 20 Aug 2018 08:12:18 GMT

I cant find a "speak back" section under help.

So where can I report a bug to Auodesk?

Re: imageplane with alpha and dof

mspeer — Tue, 21 Aug 2018 01:44:42 GMT

Hi!

Should look like this (first in sub menu would be Report a Problem...):

https://forums.autodesk.com/t5/maya-forum/mash-utilities-menu-gt-connect-nparticles-to-mash-suggestion/m-p/6357447/highlight/true#M32984

Maybe a reset of preferences is needed.

Re: imageplane with alpha and dof

thomas_kutschera — Tue, 21 Aug 2018 08:12:28 GMT

Thank you!

I´ve been searching on the website, not in maya 😄

Re: imageplane with alpha and dof

alec.andersenLP8AU — Wed, 29 Aug 2018 22:56:01 GMT

Hello @thomas_kutschera and @mspeer,

I will be investigating this issue to confirm it is a defect. Thank you @mspeer for exploring this issue, and @thomas_kutschera thank you for bringing this to our attention!

I will provide and update as we move forward with this process.