A render to celebrate the release of Blender 5.0

 A major release (x.x to y.0) for Blender is a big deal!

I've been using Blender for 13 years, and I've only seen two major releases: 3.0 and 4.0.

Blender 3.0 (December 3, 2021)

Blender 3.0 key features (that impact me):

• Cycles X
• Asset Browser
• First geometry nodes

This was a real game-changer, but I was spending too much time gaming, so it didn't impact me very much. In fact, I didn't remember that splash screen. I do remember that Cycles X was a huge improvement. If you are going to make an improvement to a 3d application, you can't do better than make the render engine all-around better. I think that 3.0 would have been the most consequential release in Blender's history, except that late 2.x releases included changes that should have been reserved for a major release. Ton had made commitments about what the next major release would include and felt that moving to 3.0 without these promised features would have felt like cheating the community.

Blender 4.0 (October 16, 2023)

Blender 4.0 key features

• Light and Shadow linking
• Principled BSDF and AGF colour transform
• Geometry nodes improvements

Blender 4.0 felt incremental. Lots of minor improvements without a major new feature, although light and shadow linking had been a big ask from the community for a very long time because it's a standard feature in many other applications.

These summaries overlook some incredible developments in EEVEE, Grease Pencil, and the Compositor, because I haven't used them much myself.

Blender 5.0

Blender 5.0 is available in Beta, but for someone who uses a bucket-load of addons, Beta releases are not much fun. It could be, in fact, that I choose not to move over to the new release for a while, as my critical addons become compatible. True Sky is one such addon, and it's also getting a big update very soon, although apparently this isn't tied to the Blender 5.0 release.

Celebration

It doesn't seem right to create a Blender 5.0 celebration render while not using that version. But it is what it is. 

Idea: A space craft landing pod that has crashed into a forest and has been converted into a habitat. Portrait format, for a change.

Midjourney concept image 1

Midjourney concept image 2

Back to the old grindstone

This morning I started with some housekeeping. I updated to Blender 4.x's final update (4.5.4 LTS) before the provisional release of 5.0, in two days.

Rendering in tiles

I looked into using non-default tile sizes for rendering. It seems intuitive to use smaller tiles to use less VRAM when rendering. I'm not sure if this makes sense when running an RTX 5090 with its 32GB of VRAM. Currently, the use of VRAM during rendering is obscured by a limitation of the Vulkan API, which can't track usage.

Tile size: 1024x1024 

Tile size: 2048x2048

In a very quick "off-the-cuff" test of my current scene, we see that a tiny amount of render time and memory was saved by halving the tile size.

Let's try using Persistent Data, where Blender stores render calculations for reuse in follow-up renders. This might be good if, like me, you do an awful lot of iterative renders.

First render with Persistent Data

The follow-on render took seven minutes and five seconds. A catastrophic impact on render time, probably indicating that no clearing out render calculations exhausted available memory, resulting in a drop in performance. For a smaller scene, you can save part of the rendering process and save some time. Not here, though.

Tiles: 512x512

Tiles: 2048x2048 (Default)

So the smaller tiles saved less than ten seconds. That could be important for an animation where a few seconds will stack up over the total render time, but for stills, not huge. I'll stay with the default until I encounter a problem, then try rendering with a smaller tile size.

Back from the Kingdom of the Netherlands

 We visited my sister and her family because they won't be making their usual trip back to see us during the Christmas holidays. It was a smashing break!

Amster-home-of-Blender-Dam!

Had I not come with the family, I'd have made the pilgrimage to North Amsterdam to visit the entrance of the Blender Foundation. Only a thirty-minute walk from the ferry. I'll do it on a future visit.

Leo and Clara, paddling in the North Sea.

Sand-a-blowing

Den Helder lighthouse

What next?

Complete the pre-vis elements of the service road. In the next day or two, I'll go through some required tweaks with the director.

5's almost Alive!

Wednesday sees the release of the Blender 5.0 release candidate. I'll start using it then. I'll create a piece of work to celebrate the release... More on that tomorrow.

Some more terrain stuff.

 

One from the tres noir genre.

Specularity gives you a water effect.

I've started pushing the size of my terrain files up to the 1GB (8k-by-8k) single-tile export limit. You don't get a lot from the 2x2 increase in size. Although times four sounds like a big increase, you don't end up with a dramatic increase in surface detailing. Maybe a tiny bit. 

Blender School: Maarten Nauta's landscape lessons

 This Blender School lesson will be dedicated to some of the pearls of wisdom that brilliant landscape artist, Maarten Nauta scatters during his Youtube videos (example: Creating Realistic Environments with Blender.)

Preproduction and reference

Golden rule: DO NOT JUST RIGHT IN.
Write down what you need from an effort. Creating an animation will require a different starting point and a different outcome. Set boundries for the client, even if you are the client. Dawn shot? Weather? Biomes? Where is the camera? Where will the camera travel? The more things you nail down, the less chance that your effort goes astray.

1. Project Scope
2. Focus Points
3. Solid Concept
4. Get Your asset library

Reference

For more authentic biomes, consider using iNaturalist to build a shopping list of authentic plant assets.

inaturalist.org is a great souce of real-world biome data.

Maarten - "One benefit of inaturalist is that it gives you photo references from your chosen biome. This is important because the look of plants can change depending on the biome. For example, A Scots Pine in the Baltics looks different in Mediteranian environment. It's an extra step but it can help.

Reference with a mood board.

PureRef is a great tool for quickly creating a reference board.

PureRef (In this case, for Halo Tech)

Golden Rule: Animate at the beginning

If you are creating an animation, don't wait until your detailed landscape is built before doing the first pass of your animation. it will be faster and more stable if you get it blocked out while your scene is small and simple.

Big terrains and grass

In Maarten's example, his terrains are more then 20km front-to-back. Huge! When you apply a grass shader to a large terrain then roughness never looks right. The shader is treating your grass surface as a flat plane, which it absolutely isn't. Grass scatters light really well, it only reflects in exceptional circumstances, such as when it is very wet.

Turn the specularity down to 0.01 or 0.001. You could almost turn it off.

More from Maarten:
"Basically what I'm trying to say is that roughness only dictates how directly light gets reflected. At a high roughness lots the light scatters in lots of different directions causing the reflective sharpness to lower. However roughness of a texture can't emulate the 'absorbtion' (don't know a better word to describe it) of lightrays that happens with lots of foliage. Turning down the specularity lowers the amount of light that gets reflected which kind of emulates what would happen when a lightray hits a real 3D patch of grass rather than a flat grass texture."

Atmospherics

Volumes are the best. They are expensive, result in noise and flickering, but they just give you the realism. You will need high samples. 500-1000.

Anistropics:  0.5 More cinematic, as it congrigates the density of the volume around the lighter parts of a scene. When you use a Gobo, you get a deeper and complex and potentially realistic scene.

Flickering from noise reduction: Consider rendering as separate passes, so that you can apply tweaks to your volume pass, such as a slight blur.

Trees

Maarten uses Speedtree. It's Unreal-based and deeply propriatory -- as in the developer hasn't made it Blender-friendly. Obviously you can still use it.

Tip: Trees that are going into a forest, consider stripping their mesh of lower branches as they will be hidden within a forest. Leave the full branches for forest edges and isolated trees.
 

Optimise your background assets!

Don't use full detailed models in the viewport. Even after years of improvements to Blender's viewport performance, and the move to Vulkan has made a massive different, it still pays to use simple proxy objects in the viewport.

Vegetation and noise

Rescaling plants and trees for realism is very important. However, using a noise for this is not realistic. Vegetation is not random, the noise it presents are based on rules concerning moisture and the neighbouring plants. 

Getting good vegetation is about applying rules instead of random.

Geo-Scatter

Maarten uses manual scatter more than is recommended because it provides the artist with direct control over where stuff scatters. "Easy and optimised". 
Consider using the Reduced Density, right up to 90%

Scattering grasses

Maarten hides this wizardry behind his Patreon. Apparently the knowledge was gleaned from Max tutorials from industry artists.

One this is for sure YOU CAN'T SCATTER realistically on big terrains. You have to understand how hinting at distance grass is the only possibly method. Many millions of grass scatters on top of everything else will crash your system or take too long to render.

Tip: Consider baking terrains into meshes that you can decimate. Subdivision modifier is a memory hog and can be unstable.


Tip: Render with Tiles to reduce VRAM 

Cliffs and terrain verticality

Any displacement map-based terrain is going to suck and areas of steepness. A displacement can't express detail in these areas. If you need detail then you can 1) do a massive manual refinement of the mess, manually adding more geo' into the baked mesh. 2) Add some non-displaced or differently displaced assets into the cliff area.

Stolen from Maarten's Rise and Fall breakdown

The cliff details look like they perfectly follow the underlying terrain, which makes me thing this element has been modified manually to add the vertical displacement.

Maarten's Rise and Fall breakdown - How good is that? Very damned good!

90% better

 

Slow recovery

After a few days of incremental improvement, I can now declare that I'm almost better. I have a bit of gunk on my chest, but not so much to make my breathing difficult. I have cottonwool in my head, but it's now close to the normal amount.


So, it's time to get productive again. More Blender School and a return to the Service Road work. 

A weekend of scatter play

Although I wasn't very productive, I spent the weekend creating terrains and placing the first round of scatters. World Creator 2025.2 was released on Friday. Its new features help improve material blending by providing sharper noise filters and the ability to show colour soaking into alluvial flows. I might see if I can test the effects, but my workflow won't benefit from them.

Energy slump

 The data said "great night's sleep", the body said "ugggggghhhhhh". I struggled to get out of bed. Me, whom my wife has regularly accused of being a "morning person". This may be the tail-end of this infection, or perhaps this time of year is my peak SAD (Seasonally Affected Disorder) time? Anyway you spin it, I'm barely functional.

True Terrain Sketchbook

I should have completed a couple of Blender School lessons, but I'm not sure I'd get any benefit from them. Tomorrow I'll be closer to being back on track.

Not recovered, but somewhere along the road

I still feel pretty bad

It's a Monday morning. I spent the weekend urgently trying to get better. Lots of attempts at extra sleep, a bit of exercise, but nothing excessive. Usually, two rest days go a long way towards recovery from a regular infection. The good news is that after a good night's sleep, I woke up yesterday feeling like the worst was over. The bad news is that these things can have a long tail. I might feel ill for a long while, even though I no longer feel terrible. I'll look on the bright side -- I'm not hospitalised from a runaway COVID infection, and I didn't fall ill in the days leading up to our trip to the Netherlands. So there you go. My worst bout of sickness in years.

So it's True Terrain time! Feels like reruns...

Under the weather

I have flu-like symptoms, just under a week since I got the flu jab. It could be COVID. It's not kept me off work, but I have zero energy or effectiveness.

Naturally, I have been treading water, creatively. Rendering World Creator terrains using True Terrain 5.

It passes the time, but doesn't move me forward. If I'm feeling better over the weekend, I'll embark on more Blender-School.

Battlefield 6 releases today. I've always been a big fan of the franchise. I liked the last one, but I didn't love it and stopped playing because, at the time, it was crashing my system due to a CPU stability problem. I am probably going to get it, and it will cost me some productivity. 

Blender-School: Photographer 5: Overview

 This is an overview of the Super Blender Addon Photographer, which enables Blender to use industry-standard measures for rendering and lighting, allowing you to operate in a production environment where real-world measures, such as exposure levels and colour temperature, are used.

Photographer addon is not available from SuperHiveStore. You need to go to Gumroad.

Installation

Standard steps. Drag-and-drop into Blender to install or update. Easy!

Menu

Once installed, an extensive menu appears on the N-panel. The following panels are available:

Camera Fost FX

A list of post-process effects that you can enable and configure through Blender's primary workspace. No need to switch to the compositor. I'll not go into the different effects here as they're one of the addon's side hustles.

Camera List

When setting up complex multi-camera shots, this panel provides much easier control, as each camera can use its own parameters. You can switch the view by selecting the camera icon.

Main Camera [M] is an important concept. When you have a main camera, additional cameras that you spawn will inherit some of the main camera's critical parameters to ensure they work seamlessly.

Inherited properties are:
• Camera Overrides (World, Frames, Sampling...)
• Camera Post FX
• Exposure
• White Balance
• Resolution

You can set each camera's Target and show its focus plane.

You can create a Done Camera, which can move between a scene's cameras, adjusting to each camera's parameters as it moves. Use the up-down buttons to toggle your view through all the render-capable cameras.

Camera

The camera panel enables you to configure the sensors of real-world cameras, with a few popular professional cameras available as presets. With the lens focal length, the sensor size defines the field of view of the image. The larger the sensor, the wider the field of view. More

Lens

Select the camera's lens. There are presets of popular real-world lenses. You can tweak the lens position using the Lens Shift V (Vertical) and H (Horizontal) controls, or Dolly (zoom) the lens in. These are useful because they don't require that you move the camera. More

Exposure

The Exposure controls offer three different approaches. 

EV
(Exposure Value) is a simple mode that allows you to set your scene exposure according to physically based lighting guidelines, without affecting motion blur, depth of field, or film grain.

Auto 
Exposure mode that calculates the Exposure Value by sampling the viewport to calculate the average brightness of your scene. With Exposure Compensation set to 0, this average value corresponds to 18% luminance, similar to light meters and cameras, much like a camera's auto-exposure functionality.
See Auto-Exposure Tutorial.

Manual Exposure
This mode exposes controls you will find in real cameras: Shutter Speed (or Shutter Angle), Aperture and ISO (Sensitivity).

Depth of Field

Enabled, this feature supports the rendering of depth of field, where elements that are outside of the focal range will be blurred and distorted, which can provide a pleasing quality.

Focus

Use the Focus panel to set where the selected camera will focus. There are three quick modes that you can use:

AF-S (Autofocus-Single) Select a mesh in the scene on which to place the focus.

AF-C (Autofocus-Continuous) Instead of selecting a target, the camera maintains focus on the centre of its frame.

AF-Tracker: Starts a picker that allows you to pick the surface of an object to create an empty in that location, parented to the object you selected. This empty will then be used as a Camera Focus Object. This can be used to easily pick the eyes of a character, and then ensure that they stay in focus during an animation. View a focal plane tutorial. Focus planes don't render; they only appear in the viewport.

White Balance

White Balance allows you to colour correct your image per-camera, using colour temperature and tint properties.

You can enable a colour chart in your scene to aid selection, just like using a reference chart in real-world photography.

Resolution

Settings for changing rendering resolution on a per-camera basis. 

Blender School: Photographer 5x

 Photographer 5 (Introduction to lighting)

What is the Photographer addon for Blender?

At its core, Photographer adds rendering, lighting and compositing parameters that are consistent with physical lighting and photography. This can make recreating realistic scenes easier if you are familiar with photography, lighting and optics. Photographer is a must-have if you are combining Blender and real-world camera outputs. 

There are a lot of additional features, some of which are remarkable. I particularly like the Camera and Lens Post FX because you can set up realistic bloom and glow effects in just a few clicks without needing to access the compositor interface. There are more features, but I've not used them because I've never learned how they work. The next few posts will follow my journey deeper into Photographer 5.

 First, a refresher on Lighting:

There are two scientific approaches to measuring light:

Photometry: measures visible light by weighting its power according to the human eye's varying sensitivity to different colours. This is a system used by photographers and filmmakers.
Radiometry: measures the total power of light (radiant flux) across the entire electromagnetic spectrum. This is the absolute measure that isn't based on human perception.

Scale and Light
Light strength changes the apparent scale of a scene. This truism should encourage you to set up scenes that use real-world scale, as you are less likely to be bamboozled by trying to make things look realistic that are fundamentally unrealistic. 

Inverse Square Law and brightness
The brightness of a light source follows the inverse square law, so it falls off very quickly. You'll subconsiously see this in any depiction of a real-world scene. 

Example from CGCookie tutorial on lighting.

In a CGCookie tutorial, Jonathan Lampel provides a great example of how a well-crafted 3D scene can compromise realism, as the light from the room's lamps is as bright as sunlight. This would not be the case in reality.

Light intuitions
As an observer with properly functioning eyes, we handle changing light levels extremely well, to the extent that we don't even notice it happening. It makes us a poor judge of how much light there is in our environment because the light-capturing equipment in our heads is automatic, and our brain tries to filter the change so we're not distracted from survival tasks.

Blender's built-in light system

Blender uses the energy rating of lamps, measured in watts, to rate light sources. This makes lights easy to understand, but it isn't the whole story. The wattage of a physical bulb is a measure of the electrical energy used to create light. However, traditional bulbs waste a lot of energy in the form of heat, whereas Blender's lights don't simulate poor efficiency; they put all that power out in the form of visible light. The actual output is measured as Radiant Flux (Φ), also measured in watts. If you look at diode or gas discharge lamps, their rating is neither the electrical input (it's actually the equivalent input rating of a traditional bulb) nor the light power. Confusing! Therefore, light power requires a standard unit of measurement. We used Lumens. 

Lumen: the SI unit of luminous flux, equal to the amount of light emitted per second in a unit solid angle of one steradian from a uniform source of one candela.

This gets more confusing! Different colours of the same light value are perceived differently by human eyes. To measure the value of a naturally produced light, we use a Kelvin value. This is the value of a neutral substance, called a blackbody, that emits when heated to a Kelvin temperature. This is why there's a black body node in Blender. By colouring your lights in Kelvin values, you get more realistic results.

A light's lumen value describes its brightness, while its Kelvin temperature describes its colour.

And it's weirder! Sometimes light is even more complex than that: even with exact temperatures, wattage and so on, an LED lamp will only look like the sun if you stare at it directly, not at the things it illuminates. The full spectrum of an LED lamp is different, and surface materials can respond differently under two seemingly matching lights. There's also polarisation, but that only matters if you want realistic looks through sunglasses; otherwise, adding a bit of colour filtering would be enough to mask its effect.

Kelvin light temperature

Final thing: White Balance.

So this brings together two things we've covered. One, our eyes and brains make numerous adjustments, allowing us to filter out the "cast" created by the colour of light sources and perceive objects as white under standard lighting conditions.

Light sources create a cast based on the Kelvin temperature. From 2000K, we get a warm orange/yellow cast. When we get to 4000K the lighting has a neutral daylight cast (it's actually a bit yellow but our eyes filter it out), and when we get to the top-end of the range, the light cast turns blue (10,000K). While human eyes and brains do this perceptual filtering, cameras don't. In digital photography, you need to set what white looks like in the environment you are viewing. Professionals often use a white card to calibrate the white balance of their camera, although most cameras have a pretty good automatic setting.

The white balance is not an absolute thing. There are times when you want to capture the colour cast, such as when viewing a sunset, where that quality is an aesthetic element. However, there are times when you need the whites to be white, for example, an interior scene where you want to see that the walls are painted white, not yellow.

White balance controls were introduced as native features in Blender 4.3.

Next, we'll start looking at Photographer 5.