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Microstock Photography Forum - General => Software => Software - General => Topic started by: mtkang on March 06, 2013, 09:18

Title: blender - isolated object
Post by: mtkang on March 06, 2013, 09:18
hi guys,

anyone is using blender?

I am trying to create some fluid.. and i am thinking if there is a way to isolate the fluid? so it will be useful for buyer?

I remember sth like alpha mask? is it same as masking in photoshop?

any guy can give some direction?

thanks.
Title: Re: blender - isolated object
Post by: tab62 on March 06, 2013, 09:53
than why not just do layer and masking in Photoshop to get your effect...
Title: Re: blender - isolated object
Post by: mtkang on March 06, 2013, 10:48
i am thinking if it is possible to generate during 3d render.. like to separate the object from background.

since it is a liquid..i may take sometimes to use pen tool to isolate in photoshop..
Title: Re: blender - isolated object
Post by: lbarn on March 06, 2013, 16:14
Have you tried to change the output under the camera tab to png and choose RGBA button; render, then on the rendered window on the lower right side choose colors and alpha (triangle button), then save as image png
Title: Re: blender - isolated object
Post by: mtkang on March 09, 2013, 21:33
do i need to put the background and object on different layers?

how would the system able to render a transparent background?

thanks.

Have you tried to change the output under the camera tab to png and choose RGBA button; render, then on the rendered window on the lower right side choose colors and alpha (triangle button), then save as image png
Title: Re: blender - isolated object
Post by: crazychristina on March 09, 2013, 21:37
I just rendered the default cube after setting the output to PNG/RGBA, and saved the resulting render. It opens in Photoshop as a cube with transparent background.
Title: Re: blender - isolated object
Post by: dingles on March 09, 2013, 23:04
I your render will already be isolated and contain alpha ata as long as you only have th object in the scene. You need to save the render to a file format that supports alpha data...PNG, TGA...
Title: Re: blender - isolated object
Post by: mtkang on March 09, 2013, 23:55
I put a white backdrop at the back of my object.. should i remove it? if i remove it?

I will  try to render first..

I just rendered the default cube after setting the output to PNG/RGBA, and saved the resulting render. It opens in Photoshop as a cube with transparent background.
Title: Re: blender - isolated object
Post by: mtkang on March 10, 2013, 20:08
hi all,

i try to render outpout as png, RGBA..and remove the backdrop.. and i got isolated dark grey background.

is it how blender render as isolated object? i can remove the dark grey background in photoshop..

how can i achieve the transparent background?

thanks.
Title: Re: blender - isolated object
Post by: crazychristina on March 10, 2013, 20:36
Here (https://dl.dropbox.com/u/3296211/untitled.blend) is the .blend I used to create this image (https://dl.dropbox.com/u/3296211/untitled.png). On my computer the image opens in Photoshop as a png file showing a cube on a TRANSPARENT background.
Title: Re: blender - isolated object
Post by: lbarn on March 10, 2013, 20:43
When you got to the step after rendering, but before saving, pressing the (triangle button)lower right side choose colors and alpha, did you see the background turn into a black and white square background, i.e. no background?  Then you can save as a png that you can use in photoshop, to add a white background for an isolated object, or add into a composition.
Title: Re: blender - isolated object
Post by: mtkang on March 11, 2013, 04:27
Hi, the 'triangle button' is under 'output' tab under the 'scene'?

by the way i am rendering it with cycles..i wonder does it make a difference.

I can render the output with a dark grey background which easy to remove from photoshop, but i wonder how to turn it to transparent in blender.

When you got to the step after rendering, but before saving, pressing the (triangle button)lower right side choose colors and alpha, did you see the background turn into a black and white square background, i.e. no background?  Then you can save as a png that you can use in photoshop, to add a white background for an isolated object, or add into a composition.
Title: Re: blender - isolated object
Post by: crazychristina on March 11, 2013, 05:27
OK, Cycles. I was using BI. I just tried checking Transparent on the film subpanel of the Render panel, with output set to PNG/RGBA and it rendered with a transparent background using Cycles.
Title: Re: blender - isolated object
Post by: mtkang on March 11, 2013, 07:34
thank you very much!

OK, Cycles. I was using BI. I just tried checking Transparent on the film subpanel of the Render panel, with output set to PNG/RGBA and it rendered with a transparent background using Cycles.
Title: Re: blender - isolated object
Post by: mtkang on March 11, 2013, 09:34
it works! thanks!

OK, Cycles. I was using BI. I just tried checking Transparent on the film subpanel of the Render panel, with output set to PNG/RGBA and it rendered with a transparent background using Cycles.