In this case, because there are so many transparent objects, the scene is quite expensive. the Deep Shadows are storing a lot of transparency data and that gets more expensive the more transparent objects there are. The reason the image takes long to render is the same reason the shadows (particularly the self-shadowing) look good. You'll notice that the image took a long time to render. Now render the Maya scene you should get spheres. Now select the particles and change them from points to spheres. ![]() Close the scene and then reopen, particles.ma, to restore the default settings for the scene. Next we'll work with the Maya sphere particles. So next: change the rate of particles per second from 300 to 30000, set the particles to nearly transparent in the Lambert material, and do the particle run-up again. We can make the points smaller by setting the Point Size parameter to "1." Now render the Maya scene, you should have smaller points:īecause RenderMan can handle huge amounts of points, a common technique is to set the points to be nearly transparent and render a much larger amount. You'll notice that RenderMan renders points in world space, not pixel space, which has the advantage of giving the points an actual size in the Maya scene. Now we adjust additional attributes for the points particle type. Do this by selecting the "Current Render Type" button next to the Add Attributes field of the Render Attributes sub-tab. Next add the particle attributes for this specific partical system, points. This particle system already has per-particle attributes for color and opacity set for you. You'll also notice that RenderMan for Maya honors Maya's per-particle attributes, like color and opacity. One of the nice things about Deep Shadows is that the shadows are motion blurred, too. You should get an image like the one below. Enable motion blur by clicking the appropriate check box (next to Motion Blur). We can add motion blur by opening the Render Globals and selecting the Features tab. Motion blur would be a nice effect to add to these particles. You should get an image with brighter particles. For now just change the color from grey to white, and render the Maya scene: Note you can adjust any of the Lambert parameters: Diffuse, Transparency, etc. We can make the particles brighter by selecting the Lambert and changing its color from grey to white. Next we'll take a look at what can be done with several of the particle types in RenderMan for Maya.īecause we're rendering particles in software mode, we can tweak the Lambert material attached to these particles.
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