02 FilmUnlimited Nodegraph Breakdown & Usage

Node Graph Overview Understanding the Power Grade Structure

Color-Coded Node Explanation

• The node graph is color-coded for clarity: orange nodes represent pre-negative emulation image prep, violet nodes are for negative emulation, and olive nodes indicate output transform.

• Each node serves a specific function, with adjustments available depending on the node type. The first node discussed is the color space transform.

Key Nodes in Power Grade

Color Space Transform

• Converts array log C into linear; recommended to leave unchanged if using Alexa transforms.

Matrix Node

• Responsible for matching Alexa footage to film; should also remain unchanged during grading.

Exposure Balance Node

• This is one of three major adjustment nodes that can be modified based on footage needs; it uses CST to revert from linear back to log C. Adjust only if out-of-gamut clipping occurs.

Managing Clipping and Highlights

• The power grid aims to minimize out-of-gamut clipping; enabling gamut mapping can resolve issues when they arise. The exposure balance node smoothens highlight transitions at clipping points, preventing noticeable abruptness in saturated areas.

Fine Adjustments in Negative Emulation

Saturation, Hue, and Luminosity Nodes

• These three nodes allow for finer adjustments post-core transformation by the Matrix node; changes should be made cautiously to maintain balance within each node.

• Generally, only the Hue node is adjusted project-wide rather than shot-by-shot for efficiency; consistent hue issues can be corrected across all shots by copying adjustments from the Hue node.

Combining Film Emulations

• Experimenting with mixing saturation, hue, or luma between different film emulations (e.g., pastel saturation of 250D with hue/luma of 500T) can yield unique results tailored to project needs.

Correction Techniques

Correcting Within Negative Emulation

• Corrections within this node allow adjustments on a saturated image before other effects like halation and tint are applied, making qualifications easier due to a neutral base image being used for corrections. Utilize this for specific shot corrections beyond basic tools like color warper.

Skin Tone Adjustments

• Avoid blanket skin tone qualifications across all shots as frequent need indicates initial color balance issues; revisit initial settings before applying qualified corrections if necessary.

Halation Effects Management

Compound Node Functionality

• Houses halation effects split into wide and narrow categories; typically left unchanged unless specific camera limitations require adjustment based on recording stops above middle gray or resolution discrepancies between grading and output resolutions.

Resolution Considerations

• If grading at lower resolutions but outputting higher (e.g., 1080p vs 8K), adjust halation size accordingly after switching project settings to match final output resolution for accurate previews and minor proportional adjustments as needed.

Film Tint Application

Tint Nodes Breakdown

• Comprises base tint (minimum requirement), low tint (optional enhancement), and high tint (for full film look); careful application ensures desired aesthetic without overwhelming highlights with unwanted colors like green hues in clean projects.

Mixing Tints Between Emulations

• Base tint remains consistent across both 500T and 250D emulations while high tints differ—adjust these carefully according to project requirements while considering overall visual impact on client expectations.

Film Emulation Techniques in Color Grading

Overview of Emulation Nodes

• The emulation process includes a unique low tint node integrated into the 250D emulation, with a preference for the 250D high tint for skin tones. Adjustments can be made to suit individual preferences.

Sharpening Techniques

• The sharpening compound node is divided into full image and highlight-only sharpening. Users can adjust the sharpening radius and amount (scaling), though it's often left untouched except for occasional increases on the high node to enhance image definition without over-sharpening.

Film Blur Application

• The film blur node softens high-frequency details introduced by sharpening. Typically set at 0.05, it can be adjusted higher for emulating different film

Understanding Exposure and Color Balance in Film Grading

Image Preparation and Node Functionality

• The discussion begins with the importance of enabling specific settings for achieving a full emulation look, primarily visible in locked-off shots. Generally, these settings are left off unless needed.

• Two main exposure/balance nodes are introduced as part of the image prep section, crucial for placing images correctly before negative emulation to maximize output transform and shot matching.

• The first node operates in linear space, allowing accurate exposure and white balance adjustments that yield natural results comparable to raw footage adjustments.

• Adjustments should be made using gain-based tools like the gain wheel and master gain wheel; other tools may lead to undesirable outcomes.

• The master gain wheel is essential for setting correct exposure levels between shots, where doubling or halving values directly correlates to one-stop changes in exposure.

Color Balancing Techniques

• The gain wheel also controls color balance, functioning similarly to temperature adjustment but more intuitively. It aids in matching colors across different shots.

• Adjustments can be approached from two perspectives: correction (removing color casts for clean outputs) or creative intent (enhancing existing scene qualities).

• For corrections, skin tones serve as a reference point; if absent, neutral elements within the scene should guide adjustments until visually satisfactory results are achieved.

• Creative intent allows for accentuating aspects like warmth in sunsets or cooling down overly neutral scenes. This method reduces color separation and is best used when major qualifications aren't planned downstream.

Advanced Node Usage

• A second exposure balance node serves similar purposes but uses different tools operating outside linear space; it employs master offset wheels for exposure control instead of gain wheels.

• In this log-operating node, contrast pivot and saturation are key tools used mainly for correcting issues rather than making significant grading changes.

• While well-exposed footage typically requires minimal corrections, creative adjustments can still be applied here if necessary.

• Alternatively, users may bypass this node entirely for a simpler workflow by deferring all contrast and saturation corrections to the final adjustment node without significant visual differences unless major corrections are required.

Final Adjustment Node Insights

• The third adjustment node functions post-negative emulation akin to working on a film scan; it allows comprehensive grading techniques without restriction to single-node operations.

• This position is ideal for applying looks after achieving neutral balances earlier while also facilitating project-wide contrast and saturation adjustments based on print light effects.

Adjusting Project-Wide Settings in Nodes

Understanding Node Adjustments

• The speaker discusses the importance of making project-wide adjustments using an additional node, emphasizing the need to keep these adjustments separate from shot-specific directions.

• Three nodes are introduced, which may initially appear confusing; however, familiarity with their functions will develop over time as one works with them.

• It is recommended to adhere strictly to the suggested tools for adjustments, particularly highlighting the significance of using the first linear node correctly.

• The speaker encourages users to experiment and find out which types of adjustments work best in each specific node context.

• Overall, understanding how to effectively utilize these nodes can enhance workflow efficiency and improve project outcomes.