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SUB works like ADD
Posted: Thu Oct 27, 2016 11:52 am
by pele2010
Hi,
since the beta1 I am having the problem, that the "sub blending" mode is not working like it used to be.
If a layer was above another layer and was "sub'ed" it used to subtract information from the layer below.
In the M8 3 Beta it´s adding information to the layer.
So if you feedback loops you can´t play with the "sub" blending mode anymore.
You need to use "exc" but it works different to the "sub" blending mode.
Does someone have the same problems?
best peter
Re: SUB works like ADD
Posted: Thu Oct 27, 2016 4:37 pm
by Pierre Guilluy
Here's the simplest example I could make (testcard as a background and a white square on top) trying to replicate your problem:
ADD
v3
- M8_V3_ADD.png (419.01 KiB) Viewed 7327 times
v2
- M8_V2_ADD.png (290.2 KiB) Viewed 7327 times
SUB
v3
- M8_V3_SUB.png (413.06 KiB) Viewed 7327 times
v2
- M8_V2_SUB.png (287.47 KiB) Viewed 7327 times
EXC
v3
- M8_V3_EXC.png (424.4 KiB) Viewed 7327 times
v2
- M8_V2_EXC.png (296.69 KiB) Viewed 7327 times
I can't see any difference between version 2 and 3 regarding the way the blending mode works.
Couldn't it be some running module that messes with the blending on either version?
Re: SUB works like ADD
Posted: Thu Oct 27, 2016 5:33 pm
by pele2010
Hi Pierre,
that was always my problem , that my experience differs from the others!
from top to bottom
add
sub
premult
scr
exc
here you can see that only "SCR" and "EXC" are like they used to be ...
- ADD_SUB.jpg (43.72 KiB) Viewed 7319 times
Re: SUB works like ADD
Posted: Thu Oct 27, 2016 5:41 pm
by pele2010
and her the screenshots itself
add
- add
- add.jpg (79.98 KiB) Viewed 7319 times
sub
- sub
- sub.jpg (76.92 KiB) Viewed 7319 times
premult
- premult
- premult.jpg (78.87 KiB) Viewed 7319 times
Re: SUB works like ADD
Posted: Thu Oct 27, 2016 5:42 pm
by pele2010
and
SCR
- SCR
- SCR.jpg (82.03 KiB) Viewed 7319 times
EXC
- EXC
- EXC.jpg (93.39 KiB) Viewed 7319 times
Re: SUB works like ADD
Posted: Thu Oct 27, 2016 5:44 pm
by pele2010
And the question was:
can it be the graphic card I am using?
- Bildschirmfoto 2016-10-27 um 17.44.45.png (44.46 KiB) Viewed 7319 times
Re: SUB works like ADD
Posted: Mon Oct 31, 2016 11:58 am
by Pierre Guilluy
Hi Peter,
Thanks for sending the graphic-card model you're using:
I just ran my tests again but forcing the integrated Iris GPU this time instead of the discrete one and I can reproduce your problem.
I will now go through a debug session and let you know.
Pierre
Re: SUB works like ADD
Posted: Mon Oct 31, 2016 12:03 pm
by pele2010
Puh,
I thought I was getting crazy ....
thanxs Peter
Re: SUB works like ADD
Posted: Mon Oct 31, 2016 1:23 pm
by Pierre Guilluy
I've just check and I have the exact same result using Modul8 2.9.2.
Anyways I've just found the bug and the fix will be available in the next beta!
Pierre