2/22/2023 0 Comments Cgi texture flickeryTo do that, we need four expressions, which are Panner, TexCoord, Multiply and a Constant Vector. Now we’re going to extract the Cloud texture information from the Green channel of the texture and will add some random movement/ animation to the cloud texture. Camera Depth: Camera depth is to add a slight depth effect at a distance around the edges of the firefly particles.Īnd then we'll be merging all of the three above setups using a couple of Add and Multiply expressions. Adding Color: This setup is pretty much self explanatory, that is to add color to the whole setup in the Material. Flickering effect: An effect that we need for this Firefly particle.ģ. Firefly texture: Extracting the Firefly texture from the Red Channel of the texture that we created in Photoshop earlier.Ģ. Cloud Texture: Extracting the Cloud texture from the Green channel of the texture that we created in Photoshop earlier and then adding some random animation to it. Firefly Setup: This setup is further divided into two sub-setups which are: Right Click on the Content Browser and create a New Material, name it " Firefly_mat" just like in the pic below (or you can name your material anything you like.)ĭouble Click on the Firefly Material and import the Cloud Texture into the editor, or simply drag and drop the texture into the Material Editor.įor the Firefly particle material, we'll be creating three main setups. Once UDK is loaded, Import that newly created Firefly texture into the Content Browser with a New Package called " Firefly Particle".Īfter creating a new package and then importing the Firefly texture, it’s now time to create a Material for the Firefly particle system. Creating the Firefly Material for the Particles in UDKĮditors Note: You can download the high-res images of the Material setup using the Download Attachment button at the top of this page. This is it! Our Firefly texture is now done, so just save the texture as a Targaįile (. Now go to Layers Tab and you will see something like what's shown below in Layer 1. Yes that’s right, just blank, so fill it with White color just like in the image below. We already have information in the Red Channel, so it’s time for us to put some information into the Blue channel as well, which is currently blank. To know more about merging textures in the RGB channel, checkout my previous Hologram tutorial. What we have done here is merge the two textures into one file by splitting the channels. This will enable only the Green channel and the rest of the channels will be disabled just like in the pic below.Ĭloud texture into the Green channel. Now you're left with Layer 1, which is the layer with the white radial texture, so simply select that Layer.Īfter selecting the Layer ( Layer 0), go to the Channels tab and select the Green channel. Delete this Layer ( Layer 0) once you have copied it. Go back to the cloud layer ( Layer 0) and select the whole layer by holding down your Control key and Left Clicking on the layer, and then simply copy the layer by Pressing Control-C. We now have two layers: a white radial gradient on Layer 1 and a Cloud texture on White radial gradient on a black background just like in the next image. Now create a New Layer and then create a nice You get a nice spread of clouds like the example below. Now go to Filter > Render and select Clouds to render a black and white cloudĪfter selecting the Cloud filter, keep hitting Control-F to reapply the last used Filter until It’s better that we start from the lowest resolution first. Resolution? Because we don’t want high-res texture detail in our firefly particle that could slow down our system if we put 10-20 instances of such a particle into the environment. Shown in the picture below, create a new document with a resolution of 128x128. You can download them using the Download Attachment button in the right side-bar.įirst we have to create a texture for the firefly particle, so let’s fire up Photoshop and get started. To better understand this tutorial you at least need to know the basics of shading and material creation in UDK.Įditors Note: If you'd prefer to follow along using high resolution Images. We'll start by creating a texture for our particle in Photoshop and then move to UDK where we'll learn how to turn that texture into particles, which is the most important part of this tutorial. In this tutorial, we'll be learning some of the basics of UDK’s Particle system while creating a Firefly particle.
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