Questions tagged [transparency]

Transparency can be anything from an alpha-channel in an image, to shaders in the BGE, to transparency in a material, to the alpha pass in the compositor.

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13
votes
2answers
9k views

Add a transparent image on top of a material [duplicate]

I'm designing this animal-type creature, and want to add a transparent .png image to its face with the face features (object has a subsurf). On the left is the image with the features, on the right is ...
208
votes
3answers
283k views

Can Blender render pngs with the background transparent?

I would like to render an animation as a series of .png images with transparent backgrounds for use in a video. Is this possible?
17
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1answer
3k views

Black artifacts when looking through many transparent objects?

Using v2.73, cycles and a very simple scene: an array of cubes, no big deal. If I set the shader's material to transparent, the cubes in the foreground do become transparent but those far away in the ...
10
votes
1answer
18k views

How can I setup a Material in Cycles for Z-Transparency?

After converting to nodes in order to render using Cycles I've no idea where to enable the z-transparency. I guess the image textures alpha channel needs to be pluged somewhere but I've no idea which ...
11
votes
1answer
19k views

Image Alpha Background Renders Black when using “Import Images as Planes”

I must be missing something here. I'm doing an extremely simple Import Image as Plane using the AddOn and the imported image has an alpha background but it renders (and even previews in the material ...
15
votes
3answers
6k views

How to properly render smoke on a transparent background?

When rendering volumes with Film > Transparent enabled, the alpha appears to be the wrong type (premultiplied/straight). In the 3D view it works as expected: This is a known bug. Is there any way to ...
6
votes
1answer
3k views

Transparent textured planes produce black artifacts

Having problems with hair transparency using cycles. I ported over a model from daz studio (have done this a few times before with no issues). Using a simple mix shader, transparent top, diffuse ...
21
votes
1answer
31k views

How can I make a more realistic glass shader? [duplicate]

Here's a sample scene: A room with a window, a point light to project light into the room, an HDR environment outside the room and a nice Image by Rembrandt that should be somewhat reflected on the ...
15
votes
2answers
12k views

Render shadows over a transparent background in cycles

I'm trying to make a logo that will be on the header of a website. What I'd like to achieve, and the reason I'm using Blender, is the projected shadows on the background looking perfectly real (as ...
9
votes
1answer
3k views

Render semi-transparent volume with cycles

I want to render an image of a fire in cycles, but as a png with a transparent background. Without a transparent background, the output image looks like this: But as soon as I tick the "Transparent" ...
9
votes
1answer
4k views

Setup a decal material in cycles [duplicate]

I'm trying to setup a image decal in cycles, and I can't figure how to setup the nodes to work fine. Does anyone know the solution? blendFile
9
votes
4answers
3k views

Glow effect invisible on transparent background

I'm trying to render a lightsaber on a transparent background to use as game sprites. I've followed a tutorial on youtube to create the glow/blur effect and it worked great on a black background but ...
8
votes
1answer
2k views

Rendering fire animations with transparent background

I'm creating a simple fireball sprite for my game and I want to render a fire animation. I would like to get the upper images with transparent background, but when is set the transparency on under ...
27
votes
9answers
40k views

Any Video formats that render with Alpha Channel?

Does anyone know if there are any video formats (besides the HUGE uncompressed avis) that you can render in that maintain the alpha channel? (i.e. for after FX etc.) I used to use quicktime, but ...
8
votes
1answer
19k views

How can I make an object invisible when I render in Cycles?

Using the Cycles Render Engine How can I make an object invisible when I render?
10
votes
1answer
95k views

Transparent image textures in cycles [duplicate]

I added two planes in Cycles with Image Texture in png with some transparency. I covered one by the other but transparency doesn't work, I mean it is impossible to see the one which is under despite ...
5
votes
1answer
403 views

Make light paths only pass through non-emitted areas?

I'm trying to make it so that the plane is transparent except for the light from the aqua emission. Or in other words, how can I make it so that the plane's white areas are transparent and the plane's ...
20
votes
1answer
5k views

How to render a mesh transparent with a color on its edges only, with nodes?

I would like to have my object transparent, with a color only on the edges, would someone know how to do this? I am starting with the nodes, if anyone can help with some guidelines I would really ...
11
votes
2answers
3k views

Is there a way to have Cycles skip rendering alpha?

If I wanted to create an animation, each frame would have several seconds of rendering a completely transparent part, which adds up obviously. Is there a way to eliminate this waste of time?
3
votes
1answer
259 views

Animating appearing/extending strip with gaps

As i am new to blender i decided to learn by recreating some animations which have some interesting problems, and gain more knowledge about how tv intros are being done, collecting some parody intros ...
12
votes
3answers
5k views

How to create a gradient texture from one material to another (opaque to clear)?

I am trying to render an object that has opaque base and gradually becomes clear/translucent at the top in Blender cycles. Please see the attached image (which was not made with blender).
18
votes
1answer
20k views

Render shadow on transparent background with Blender Render [duplicate]

I need to render a model on a transparent background. The models have a light source so they should be casting a shadow on a surface (the XY plane). The purpose for this is to overlay the rendered ...
9
votes
4answers
2k views

Is there a way to add fake thickness to an alpha image texture?

I'm using Cycles I want to add thickness to a texture with alpha transparency like @rich-sedman do in his nice answer here: How can I make a hexagonal grill? But this time with an image texture (jpg+...
3
votes
1answer
967 views

Render Halo material with tranparent background

I make a "shockwave" using Halo material. It looks nice only for the black background. If I check "Shading > Alpha > Transparent", render result is breaks down. How to fix it?
3
votes
3answers
968 views

Striped Sphere - hide backfaces

I created a sphere and colored its faces in several horizontal stripes like blue, transparent, blue, transparent... etc Pretty much when in Object mode & Viewport shading set to Material the ...
8
votes
1answer
19k views

Texture mapping with multiple UV maps

So, as a newbie relatively new to blender, I started doing some texture mapping (blender internal Render). I created a texture for the main object and a couple of transparent decals to decorate it. (...
5
votes
1answer
3k views

Can blender use the Alpha channel of an image as transparency on a plane?

I was wondering if I used Photoshop to make a portion of my picture transparent, Would Blender be able to use those transparencies while importing the photo using the Import images as a plane Add-on
8
votes
4answers
4k views

Using mask as a garbage matte to hide an object

I'm trying to use a mask to hide a part of a render layer, so that when the render layer is shown over a movie, some parts in the movie will appear to be in front of the render layer. For example, ...
3
votes
2answers
2k views

Cycles not using transparency in decal texture?

I'm trying to apply the logo onto the glossy part and cycles render ignores the transparency and just makes it black. I've tried both png and tga using the multiple builds of blender. And it looks ...
2
votes
1answer
675 views

Rendering Environment pass without Combined pass in Cycles

Using Cycles,I have a scene with Volume Scatter shader connected to World Background and an HDR image connected to the surface, Rendering the scene while checking Environment pass is giving me a nice ...
6
votes
4answers
3k views

How can I reflect a transparent background?

I'd like to make a glossy surface which reflects objects above it, but that also reflects a transparent background in the final render. So in effect, the final render would contain only the ...
0
votes
1answer
1k views

Change Color Associated with Transparency? [closed]

ok so here is my problem. in this picture i want the White outside the Blue to be Transparent, and the White inside the Blue to to White. this is as far as i get when just using the Transparent BSDF. ...
0
votes
1answer
499 views

Is there a Blender alternative to Chroma Key rendering in OpenGL?

Self answered Question - no points being sought here. For some months I've been using a transparency phenomena in Blender's 3D viewport that renders objects that are behind semmi-transparent objects ...
15
votes
1answer
11k views

how to render semi-transparent objects with transparent background as a png with cycles

I am rendering out some bubbles for use in a composite Photoshop image, so I need to render as a transparent png with the bubbles semi-transparent. I tried setting render output to RGBA and checking ...
7
votes
1answer
995 views

Compositing: When to use premultiplied alpha?

When should one check the Convert Premul box on nodes that use alpha? Secondly, why is there a Premul slider on the Alpha Over node? When would you need it to be something other than 0 or 1? I ...
2
votes
1answer
473 views

Partly Ignored PNG Alpha?

I just selected some pixels in Photoshop and deleted them, so this part became transparent. I save it as PNG. And imported this image as texture for cycles material. What surprised me is a "Material" ...
2
votes
1answer
741 views

Using Alpha Textures doesn't work properly [duplicate]

I'm trying to mix to shaders with the use of an alpha texture. I UV unwrapped the cube and adjusted the mapping but it still doesn't work. On the top of the cube there should be a P with the Glossy ...
2
votes
1answer
722 views

How Do I Create a self drawing 2D Shape?

Major Noob Question here but I want to create a 2d shape that seems to draw itself like in this video below: https://www.youtube.com/watch?v=YLNmtk67unY I saw in KaptainKrisitan's videos and wanted ...
9
votes
4answers
35k views

Why is the alpha channel not working?

I was trying to make a really low poly flower, basically using 2D planes and applying textures with an alpha channel (Targa, 32 bit). However when doing the UV mapping and applying the texture as ...
3
votes
1answer
4k views

Compositing fog destroys PNG alpha in Images as Planes when using Cycles

I'm following Andrew Price's spaceship tutorial and taking advantage of the inbuilt addon called Import Images as Planes. Here you can see 2 Images as Planes used for the steam columns, close to the ...
2
votes
3answers
391 views

Transparency/Masking : See through an Outer Sphere and see Inner Sphere in true colours

Summary I want to be able to look through an outer sphere - BlueSphere, and see another sphere inside - RedSphere This is the target goal I'm trying to get to: Issues Here is what I have tried, ...
4
votes
1answer
377 views

How to setup shaders for semitransparent mirrors?

I would like to produce a box with an effect like this one : http://www.thisiscolossal.com/2015/07/guillaume-lachapelles-mirror-dioramas/ I have been trying to create a mix shader between glossy ...
3
votes
1answer
825 views

How to get rid of internal shadows/blackness in glass/transparent/refractive materials?

So I'm trying to make some very refractive glass in Blender Cycles. I've tried using the mix shader with Glass, Trasparency, by a factor of Is Shadow Ray + Is Reflection/Trasparency Ray etc, and I've ...
1
vote
1answer
7k views

Alpha Channel in Eevee?

Apologies in advance for the Eevee question... but!...now that the releases are getting more stable, I'm messing around with it and wondering if anyone has gotten an alpha channel/transparency mix ...
7
votes
2answers
789 views

Why should I never ever use “Convert Premul” on Cycles renders?

On this question, When trying to overlay images using Alpha Over for green screen work , I used premultiply Alpha, it was the only option that would give me clean key without the background bleeding ...
2
votes
2answers
652 views

Rotoscoping to a transparent background

I'm currently trying to rotoscope a video and the background is currently white and I don't know how to make it transparent. Here is a screenshot:
1
vote
4answers
214 views

How can I remove darkness from behind objects?

I am getting problem like below image. First trees row getting darkness of behind second trees row. you can understand clearly using below image. I am using z-transparency to hide my plan background. ...
1
vote
2answers
995 views

Render Glass like materials with Alpha Channel to composite in external app

Hope you can help me with some issues I've been dealing these days. As I'm rendering products, most of the time I need to render some transparent materials in order to do a post-pro in Photoshop, ...
1
vote
1answer
741 views

Can I make an object invisible in Cycles without letting the camera see what is behind it?

I would like my mountain to be invisible after rendering. And I want just Objects in front of it (like trees) to be seen, but not behind the mountain.
12
votes
1answer
6k views

Alpha channel through glass material instead of background (Cycles)

I'm trying to render some windows, reflecting an environment map, and to be transparent to let light enter inside the house. There are two windows facing each, and I need to see throught both, and ...