color superpostion to color fusion

[Anonymous]

Hello !

I would like to know if it is possible to fusion color it Autocad (2018 for my version) of two superimposed blocks. 

I explain myself : one of my many tasks in Autocad is to compare existing buildings and their project. In order to do that, I make a block of the existing plan and an other of the project plan. Usually I put the existing plan in a layer "existing" (color : red)  and the project in a "project" layer (green). Every element of each block in in color "ByBlock", this way I can clearly see which element is what. 

My point is : is it possible that, like in photoshop (I think it's in the layer options > multiply), if two things, one red and one green are superimposed, the color I see on my screen is black ? 

Thank you in advance !

❤️ 

pastequevolante

[Alfred.NESWADBA]

Hi,

please find for AutoCAD 2016 and younger this plugin >>>>click<<<

since AutoCAD 2019 the command _COMPARE is a built in function >>>click<<<

- alfred -

[Anonymous]

Thank you, but it is not why I intend to do. Or maybe I used the plug-in wrong ?

What I meant was : when two line, one green and one red, are superimposed, I want hte line to appear in black. 

This way I can clearly see what is new (green) and what was already their and is still their (green+red=black)

[Alfred.NESWADBA]

Hi,

>> when two line, one green and one red, are superimposed

In the same drawing or in different dwg-file?

DWG-Compare can show in different colors

• what is equal in dwg-1 and dwg-2 (these are your "superimposing objects" as far as I understand)
• what is new in dwg-2
• what was in dwg-1 which does not exist any more in dwg-2

- alfred -

[Anonymous]

My plans are in the same drawing : I made 2 different blocks : one green for the project and one red for the existing building. 

I tried to COMPARE with the plug-in (with the originals files) but I don't find the options you display in your screenshot 

[Anonymous]

and I was wrong : I am using Autocad 2017, not 2018 (if that changes anything)

[Anonymous]

I don't have a tab as you have... 

[Alfred.NESWADBA]

Hi,

>> I don't find the options you display in your screenshot 

Because I used the built in function from AutoCAD 2019

However you should see the same result in 3 colors, even if the plugin does not allow you to change the colors 😉

But I don't have the plugin installed, maybe I'm wrong with that. You might give 2019 a chance and update to it so you get access to the same function (at least you can try this using the 30day trial).

- alfred -

[Anonymous]

ok, thank you.
I'll try the trial version.

But, if anybody knows how to do the thing with an other method, I am very interested

[3wood]

Yes you can.

Just adjust your pc3 file settings as shown below:

[Anonymous]

Hello 3wood,

 That is exactly what I want to do ! ... but it doesn't work ;___; 

Or more exactly it works halfly (if this word exists).

In attatchment you'll see : green and red are mixed but the result is not black, it is dark red (any other color that is neitherred or green would be fine though). 

Can you help me ?

[3wood]

Please check transparency settings.

Here is my test: When the all objects' transparency are set to 0, Red + Green = Black. Otherwise its sort of red as in your example.

You can also simply deselect "Plot transparency" in plot settings.